Timeline of World War I

This is a summary of the events of World War one in chronological order. It has been color coded by theatres/fronts to provide a clearer understanding of what events were happening in what places during World War One.

Theaters/Fronts
Western	Eastern	Italian
Caucasian	Middle Eastern	Balkan
African	Naval	Air
Politics	Asian and Pacific	Gallipoli

1914

Dates	Events
June 28	Assassination of Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne, who was killed in Sarajevo along with his wife Duchess Sophie by Gavrilo Princip, a Bosnian Serb.[1]	Details
July 5	Austria-Hungary seeks German support for a war against Serbia in case of Russian militarism. Germany gives assurances of support.[2]
July 23	Beginning of the "Black Week". Austria-Hungary sends an ultimatum to Serbia. The Serbian response is seen as satisfactory everywhere but in Vienna.[3]	Details
July 28	Austria-Hungary declares war on Serbia.[4]	Details
	The Netherlands declare neutrality.
July 29	Kaiser Wilhelm II of Germany and Czar Nicholas II of Russia communicate via telegram.[5]
July 30	Germany sends Russia an ultimatum.[5]
August 1	Germany declares war on Russia and mobilizes.[6][7][8]
	France mobilizes.[6]
	Italy declares its neutrality.[9]
	Denmark, Sweden and Norway unitedly declare their neutrality.[10]
	Germany and the Ottoman Empire sign a secret alliance treaty.[11]	Details
August 2	Germany invades Luxembourg.[12]	Details
	Skirmish at Joncherey, first military action on the Western Front.[13]	Details
August 2–26	Germany besieges and captures fortified Longwy "the iron gate to Paris" near the Luxembourg border, opening France to mass German invasion.
August 3	Germany declares war on France.[14] Belgium denies permission for German forces to pass through to the French border.[15][16]
	Switzerland declares its neutrality and mobilizes for purposes of defense.[17][18]
August 4	Germany invades Belgium[19] to outflank the French army.	Details
	Britain protests against the violation of Belgian neutrality, guaranteed by the Treaty of London, The German Chancellor replies that the treaty is just a chiffon de papier (a scrap of paper). The United Kingdom declares war on Germany.[20]	Details
	The United States declares neutrality.
August 4–16	Siege of Liège The Germans besiege and then capture the fortresses of Liège, Belgium.	Details
August 5	German Steamer SS Pfalz surrenders after being fired on by Fort Nepean, south of Melbourne, Australia[21]	Details
	Montenegro declares war on Austria-Hungary.[22]
	The Ottoman Empire closes the Dardanelles.
August 6	Austria-Hungary declares war on Russia.[23]
	Serbia declares war on Germany.[23]
August 7
	Spain declares "the strictest neutrality."[24][25]	Details
August 7 – September 13	Battle of the Frontiers. The Germans obtain a victory against the British Expeditionary Force and France's Fifth Army.	Details
August 7–10	Battle of Mulhouse, a phase of the Battle of the Frontiers.	Details
August 8	Montenegro declares war on Germany.[23][26]
August 9	The Togoland Campaign begins.	Details
August 11	France declares war on Austria-Hungary.
August 12	The United Kingdom declares war on Austria-Hungary.[23][27]
	Battle of Halen, a phase of the Battle of the Frontiers.	Details
August 14–25	Battle of Lorraine, a phase of the Battle of the Frontiers.	Details
August 15	German troops crossed into British East Africa and occupied Taveta.	Details
August 16–20	The Serbs defeat the Austro-Hungarians at the Battle of Cer.[28]	Details
August 17	The Russian army enters East Prussia. Battle of Stallupönen.	Details
August 20	The Germans attack the Russians in East Prussia, the Battle of Gumbinnen. The attack is a failure in addition to being a deviation from the Schlieffen Plan.[29]	Details
	The Germans occupy Brussels.
	Battle of Morhange, a phase of the Battle of Lorraine.	Details
	Battle of Sarrebourg, a phase of the Battle of Lorraine.	Details
August 21	Battle of Charleroi, a phase of the Battle of the Frontiers.	Details
August 21–23	Battle of the Ardennes, a phase of the Battle of the Frontiers.	Details
August 23	Japan declares war on Germany.[23]	Details
	Battle of Mons, a phase of the Battle of the Frontiers.	Details
August 23–30	Battle of Tannenberg: the Russian army undergoes a heavy defeat by the Germans.[30]	Details
August 23 – September 11	Battle of Lemberg. The Russians capture Lviv.	Details
August 23–25	Battle of Kraśnik, a phase of the Battle of Lemberg. The Austro-Hungarian First Army defeats the Russian Fourth Army.[31]	Details
August 24	Action of Elouges.
	Battle of the Mortagne, a phase of the Battle of Lorraine.
August 24 – September 7	The Germans besiege and capture the Maubeuge Fortress.	Details
August 24 – September 28	The Allied Great Retreat to the River Marne.
August 25	Japan declares war on Austria-Hungary.[23]
	Battle of Tepe: The Kamerun Campaign begins.
August 26	British and French forces conquer Togoland, a German protectorate in West Africa.[32]	Details
	Battle of Le Grand Fayt.
August 26–27	Battle of Le Cateau. Allied retreat.	Details
August 26–30	Battle of Gnila Lipa, a phase of the Battle of Lemberg.
August 26 – September 2	Battle of Komarow, part of the Battle of Lemberg.	Details
August 26 - February 18, 1916	Siege of Mora.
August 27	Battle of Étreux.	Details
August 27 – November 7	Battle of Tsingtao: British and Japanese forces capture the German-controlled port of Tsingtao in China.	Details
August 28	The Royal Navy wins the First Battle of Heligoland Bight, North Sea.	Details
	Austria-Hungary declares war on Belgium.[23][33]
August 29–30	Battle of Saint Quentin, also known as Battle of Guise. Orderly Allied retreat.	Details
August 29–31	First Battle of Garua.
August 30	New Zealand occupies German Samoa (later Western Samoa).	Details
September 1	Action at Nery	Details
	Saint Petersburg renamed Petrograd, removing German words "Burg" and "Sankt".[34]
September 2–11	Austro-Hungarian defeat at the Battle of Rava Russka, a phase of the Battle of Lemberg.	Details
September 5	British Ship HMS Pathfinder (1904) is sunk by a German U-Boat	Details
September 5–12	First Battle of the Marne. The German advance on Paris is halted, marking the failure of the Schlieffen Plan.[35]	Details
	Battle of the Ourcq, a phase of the First Battle of the Marne.
	Battle of the Two Morins.
September 6	Battle of Nsanakong.
September 6–12	Battle of the Marshes of Saint-Gond, a phase of the First Battle of the Marne.
	Battle of Vitry, a phase of the First Battle of the Marne.
	Battle of Revigny, a phase of the First Battle of the Marne.
September 6 – October 4	Battle of Drina.
September 7	Fanning Raid.
September 7–14	First Battle of the Masurian Lakes: The Russian Army of the Neman withdraws from East Prussia with heavy casualties.	Details
September 9	Theobald von Bethmann Hollweg lays out Germany's war aims.	Details
September 11	Battle of Bita Paka.
September 13	Troops from South Africa begin invading German South-West Africa.	Details
September 13–28	The First Battle of the Aisne ends in a substantial draw. The Race to the Sea begins.	Details
September 14	Erich von Falkenhayn replaces Helmuth von Moltke the Younger as German Chief of Staff.	Details
September 14–17	Siege of Toma. Most German forces in New Guinea surrender to the Australians then or over the following year.
September 15	Boer leader Manie Maritz revolts in South Africa.	Details
September 19 – October 11	Battle of Flirey
September 20	Battle of Zanzibar, German naval victory.
September 22	Bombardment of Papeete
	German Light Cruiser Emden attacks Madras	Details
September 22–26	First Battle of Picardy.
September 24	The Siege of Przemyśl begins	Details
September 26	Battle of Sandfontein.
September 25–29	First Battle of Albert	Details
September 28 – October 10	The Germans besiege and capture Antwerp, Belgium.	Details
September 29–30	Japan occupies the Marshall Islands.
September 29 – October 31	Battle of the Vistula River, also known as Battle of Warsaw.	Details
October–July 11, 1915	Battle of Rufiji Delta, German cruiser Königsberg destroyed.
October 1–4	First Battle of Arras.	Details
October 9 – November 1	Central powers control Belgrade.	Details
October 10 – November 2	Battle of La Bassee.
October 12 – November 2	First Battle of Messines.	Details
October 13 – November 2	Battle of Armentieres.
October 16–31	Battle of the Yser. French and Belgian forces secure the coastline of Belgium.[36]	Details
October 19 – November 22	The First Battle of Ypres ends the Race to the Sea. The Germans are prevented from reaching Calais and Dunkirk.	Details
October 19 - July 7, 1915	Clashes between German and Portuguese forces in the Angola-Namibia border, without declaration of war.	Details
October 28	Battle of Penang.
October 29	Black Sea Raid. Ottoman warships bombard the Russian ports of Odessa and Sevastopol.
November 1	Russia declares war on the Ottoman Empire.
	Battle of Coronel. Von Spee's German cruiser squadron defeats a Royal Navy squadron under Christopher Cradock.[37]	Details
November 2	The United Kingdom begins the naval blockade of Germany.	Details
	Serbia declares war on the Ottoman Empire.[23]
November 2–16	Bergmann Offensive, first military engagement in the Caucasus of the First World War.
November 3	Montenegro declares war on the Ottoman Empire.
	Battle of Kilimanjaro.
November 3–5	Von Lettow-Vorbeck's German colonial forces defeat the British at the Battle of Tanga, German East Africa.	Details
November 5	France and the United Kingdom[38] declare war on the Ottoman Empire.[23]
November 6	Fao Landing, British and Indians besiege the fortress at Fao.
November 7	Japanese Forces capture the Naval Base at Tsingtao.	Details
November 11	Sultan Mehmed V declares Jihad on the Allies.[39][40]	Details
November 11–21	Battle of Basra.	Details
November 11 – December 6	Battle of Łódź (also known as Silesian Offensive).	Details
November 13	Battle of El Herri: Worst French defeat in Morocco at the hands of the Zayanes.
November 16 – December 15	Battle of Kolubara, Austro-Hungarians leave Serbia.
November 19	Bolshevik representatives at the State Duma arrested and exiled to Siberia.
November 23	Basra is occupied by the British.
December 1–13	Battle of Limanowa.
December 3–9	Battle of Qurna.
December 8	Battle of the Falklands. Von Spee's German cruiser squadron is defeated by the Royal Navy.[41]	Details
December 10	Hill 60 captured by the Germans.	Details
December 14	Ottomans occupy the Persian border town of Qotur as a bridgehead to the Caucasus, but withdraw after their defeat at Sarikamish.	Details
December 16	The German fleet shells Scarborough, Hartlepool, and Whitby England.[42]	Details
December 18–22	Battle of Givenchy.
December 17 – January 13, 1915	First Battle of Artois.
December 20	Fighting begins at perthes.
December 20 – 17 March 1915	First Battle of Champagne.	Details
December 22	Fighting begins at Noyon.	Details
December 22 – January 2, 1915	The Russians win the Battle of Sarikamish, Caucasia.[43]	Details
December 24–25	In some sectors of the Western Front, an unofficial Christmas truce is observed between German and British forces.[44]	Details
December 25 – January 18, 1915	Battle of Ardahan.

1915

Dates	Events
January 2	The Russian offensive in the Carpathians begins. It will continue until April 12.
January 4–11	Ottomans occupy Urmia and Tabriz by surprise.	Details
January 8	Japan attempts to impose its Twenty-One Demands on neutral China.
January 18–19	Battle of Jassin.
January 19	First Zeppelin raid on Great Britain.	Details
January 19 – December 22	Battle of Hartmannswillerkopf, series of battles fought to control the peak.
January 24	Battle of Dogger Bank between squadrons of the British Grand Fleet and the German Hochseeflotte.	Details
January 24–26	Chilembwe uprising led by John Chilembwe in Nyasaland.
January 28 – February 3	The Ottomans fail to capture the Suez Canal.	Details
January 30	The Russians take Tabriz.	Details
January 31	Battle of Bolimov. First German use of chemical weapons.[45]	Details
February 4	Germany begins unrestricted submarine warfare against merchant vessels.	Details
	Jan Kemp surrenders. End of the Maritz Rebellion.
	Battle of Kakamas: German invasion of South Africa repelled.
February 7–22	Second Battle of the Masurian Lakes. The Russian X Army is defeated.	Details
February 15	Troops in Singapore mutiny against the British
February 19	British and French naval attack on the Dardanelles. The Gallipoli Campaign begins.[46]	Details
March 5	Great Britain and France promise Russia Constantinople.
March 7	Ottomans retreat to Qotur, pushed by a Russian counteroffensive.	Details
March 10 – March 13	Battle of Neuve Chapelle. After an initial success, a British offensive is halted.	Details
March 14	Battle of Más a Tierra. The last remnant of the German East Asia Squadron is sunk and its crew interned in neutral Chile.
March 18	Battle of 18 March. The British and French unsuccessfully try to force the Dardanelles, losing 3 Pre-Dreadnought Battleships	Details
March 22	The Siege of Przemyśl ends. The Russians capture the fortress.	Details
April 5 – May 5	First Battle of Woevre.
April 12–14	Battle of Shaiba.
April 15	Battle of Dilman
April 19 – May 17	The Ottomans besiege the Armenian city of Van.	Details
April 22 – May 25	The Second Battle of Ypres, which ends in a stalemate. Germany first uses poison gas.	Details
April 22–23	Battle of Gravenstafel, First stage of the Second Battle of Ypres.
April 24	Deportation of Armenian intellectuals to Ankara, first act of the Armenian Genocide.
April 24 – May 5	Battle of St Julien, part of the Second Battle of Ypres.
April 25	Allied forces land on Gallipoli, landing at Anzac Cove and Cape Helles.[47]	Details
April 26	Treaty of London between the Entente and Italy.[48]	Details
	Battle of Trekkopjes.
April 28	First Battle of Krithia. The Allied advance is repelled.[49]	Details
April 29	Battle of Gurin.
May 1	The Gorlice-Tarnów Offensive begins: the German troops under General Mackensen break through the Russian lines in Galicia.	Details
	Battle of Eski Hissarlik.
May 3	Troops withdraw from Anzac Cove.	Details
	Italy revokes its commitment to a defensive alliance with Germany and Austria-Hungary.
May 6–8	Second Battle of Krithia. The Allied attempts at advancing are thwarted again.[50]	Details
May 7	The British liner Lusitania is sunk by a German U-boat.[51]	Details
May 8–13	Battle of Frezenberg Ridge, Part of the Second Battle of Ypres.
May 9 – June 18	Second Battle of Artois.
May 9	Battle of Aubers Ridge, a phase of the Second Battle of Artois.
May 10	Troops from Hungary rout the Russians at Jarosław. Lviv is again in Austrian hands.
May 11	Armistice called at Gallipoli to bury the dead.	Details
May 12	Windhoek, capital of German South-West Africa, is occupied by South African troops.[52]	Details
May 15–25	Battle of Festubert.
May 16 – June 23	Battle of Konary.
May 23	Italy declares war on Austria-Hungary.[23]	Details
May 24–25	Battle of Bellewaarde, final phase of the Second Battle of Ypres.
May 31 - June 10	Second Battle of Garua.
June–September	The Russian Great Retreat from Poland and Galicia.
June 4	Third Battle of Krithia. Yet another Allied failure.[50]	Details
	The Russians leave Przemyśl.	Details
June 21–23	Battle of Bukoba.
June 22	Mackensen breaks again through the Russian lines in the Lviv area.	Details
June 23 – July 7	First Battle of the Isonzo.	Details
June 27	The Austro-Hungarians re-enter Lviv.	Details
June 28 – July 5	The British win the Battle of Gully Ravine.	Details
June 29	Battle of Ngaundere
July 1	First aerial victory by a synchronized gun-armed fighter aircraft	Details
	Battle of Otavi.
July 9	The German forces in South-West Africa surrender.	Details
July 10–26	Battle of Manzikert.
July 18 – August 3	Second Battle of the Isonzo.	Details
July 25	Italians capture Cappuccio Wood.	Details
	First Victoria Cross awarded to a British combat pilot	Details
July 27–31	Battle of Kara Killisse.
August 5	The Germans occupy Warsaw.	Details
August 6–10	Battle of Lone Pine, part of the August Offensive.
August 6–13	Battle of Krithia Vineyard, part of the August Offensive.
August 6–15	Allies land at Suvla Bay, a phase of the August Offensive.	Details.
August 6–21	Battle of Sari Bair, part of the August Offensive. Last and unsuccessful attempt by the British to seize the Gallipoli peninsula.[53]	Details
August 7	Battle of the Nek, a phase of the August Offensive.
August 7–19	Battle of Chunuk Bair, a phase of the August Offensive.
August 19	A German U-Boat sinks the liner SS Arabic (1902). 44 died including 3 Americans
August 21	Scimitar Hill, a phase of the August Offensive.
	Italy declares war on the Ottoman Empire.[23]
August 21–29	Battle of Hill 60, part of the August Offensive.	Details
August 26 – September 19	Sventiany Offensive, a phase of the Gorlice-Tarnow Offensive.
September 1	Germany suspends unrestricted submarine warfare.	Details
September 5–8	The Zimmerwald Conference of anti-militarist European socialist parties is held in Zimmerwald, Switzerland.	Details
September 5	Nicholas II removes Grand Duke Nicholas Nikolayevich as Commander-in-Chief of the Russian Army, personally taking that position.	Details
September 15 – November 4	Third Battle of Artois.
September 19	The Germans occupy Vilnius. The Gorlice-Tarnów Offensive ends.	Details
September 25–28	Battle of Loos, a major British offensive, fails.	Details
September 25 – October 15	Battle of the Hohenzollern Redoubt, a phase of the Battle of Loos.
September 25 – November 6	Second Battle of Champagne.
September 28	Battle of Es Sinn.
October 3	Allies land troops at Salonika in Greece to aid Serbia.	Details
October 7 – December 4	Serbia is invaded by Germany, Austria-Hungary, and Bulgaria.	Details
October 12	Edith Cavell executed.
October 14	Bulgaria declares war on Serbia[23]	Details
October 14 – November 9	Morava Offensive, a phase of the Central Powers Invasion of Serbia, Bulgarians break through Serbian lines.
October 14 – November 15	Ovche Pole Offensive, a phase of the Central Powers invasion of Serbia, Bulgarians break through Serbian lines.
October 15	The United Kingdom declares war on Bulgaria.[23][54]
Montenegro declares war on Bulgaria.[23]
October 16	France declares war on Bulgaria.[23]
October 17 – November 21	Battle of Krivolak, first of the Salonika Front.
October 18 – November 4	Third Battle of the Isonzo	Details
October 19	Italy and Russia declare war on Bulgaria.[23]
October 27	Andrew Fisher resigns as Prime Minister of Australia; he is replaced by Billy Hughes.
October 29	René Viviani resigns as Prime Minister of France; he is replaced by Aristide Briand.
November 4–6	Battle of Banjo.
November 10	Pro-Central Powers Iranians seize Shiraz from pro-Entente forces and arrest all British citizens in the city.	Details
November 10 – December 2	Fourth Battle of the Isonzo
November 10 – December 4	Kosovo Offensive, a phase of the Central Powers invasion of Serbia, Serbians pushed into Albania.	Details
November 14–30	Russian forces from the Caucasus occupy Tehran.	Details
November 17	Armed by Ottomans and Germans, the Libyan Senussi cross the border and attack Egypt from the west.	Details
November 22–25	Battle of Ctesiphon, in present-day Iraq.[55]	Details
November 27	The Serbian army collapses. It will retreat to the Adriatic Sea and be evacuated by the Italian and French Navies.	Details
December – July, 1916	Battle of Lake Tanganyika.
December 6–12	Battle of Kosturino
December 7	The First Siege of Kut, Mesopotamia, by the Ottomans begins.[56]	Details
December 15	Russians occupy Hamadan.	Details
December 18	Gallipoli evacuations, a major Ottoman victory and a "disaster for the Allies."
December 19	Douglas Haig replaces John French as commander of the British Expeditionary Force.	Details
December 23	Carl Zimmermann orders the retreat of all German forces and civilians in Kamerun to the Spanish colony of Río Muni.

1916

Dates	Events
January 5–17	Austro-Hungarian offensive against Montenegro, which capitulates.	Details
January 6–7	Battle of Mojkovac
January 6–8	Battle of Sheikh Sa'ad, a phase of the First Siege of Kut.
January 9	The Gallipoli Campaign ends in an Allied defeat and an Ottoman victory.[57]	Details
January 10 – February 16	Battle of Erzurum.
January 11	Corfu occupied by the Allies.	Details
January 13	Battle of Wadi, a phase of the First Siege of Kut.	Details
January 21	Battle of Hanna, a phase of the First Siege of Kut.
January 24	Reinhard Scheer is appointed commander of Germany's Hochseeflotte.[58]	Details
January 27	Conscription introduced in the United Kingdom by the Military Service Act 1916.[59]	Details
February 5 – April 15	Trebizond Campaign.
February 12	Battle of Salaita Hill.
February 21	The Battle of Verdun begins.[60]
February 26	Battle of Agagia: Senussi rebellion suppressed by the British.
February 28	German Kamerun (Cameroon) surrenders.	Details
March 1	Germany resumes unrestricted submarine warfare.	Details
March 1–15	Fifth Battle of the Isonzo.
March 2 – August 4	Battle of Bitlis.
March 8	Battle of Dujaila: a British attempt to relieve Kut failed.	Details
March 9	Germany declares war on Portugal.[23] Portugal officially enters the war.	Details
March 11–12	Battle of Latema Nek.
March 14	The Manifesto of the Sixteen, declaring Kropotkinist-anarchist support of the Allied war effort, is published.	Details
March 15	Austria-Hungary declares war on Portugal.[23]
March 16 - November 6	British preemptively occupy the Sultanate of Darfur and annex it to the Anglo-Egyptian Sudan.	Details
March 18	Battle of Kahe.
March 18 – April	Lake Naroch Offensive.
April 24–29	Easter Rising by Irish rebels for independence from the United Kingdom.	Details
April 24–30	The Kienthal Conference, the second meeting of the anti-war socialist Zimmerwald Movement, is held in Kienthal, Switzerland.	Details
April 27–29	Gas attacks at Hulluch.
April 29	The British forces under siege at Kut surrender to the Ottomans, first siege of Kut ends.	Details
May 7–10	Battle of Kondoa Irangi.
May 10	Germany suspends unrestricted submarine warfare.	Details
May 15 – June 10	Austro-Hungarian Strafexpedition in Trentino.	Details
May 16	Signing of the Sykes-Picot Agreement between Britain and France defining their proposed spheres in the Middle East.	Details
May 18	Russian forces in Persia link up with the British in Mesopotamia, but it is too late.	Details
May 31 – June 1	Battle of Jutland between Britain's Grand Fleet and Germany's Hochseeflotte.	Details
June 2–14	Battle of Mont Sorrel.
June 3	Russians fail to encircle Ottoman forces in Persia.	Details
June 4	The Brusilov Offensive begins.
June 5	The Arab Revolt in Hejaz begins.	Details
	HMS Hampshire is sunk off the Orkney Islands; Lord Kitchener dies.	Details
June 8	In the Adriatic Sea the Italian troopship SS Principe Umberto is sunk by an Austro-Hungarian submarine. It is the deadliest sinking of the war, with 1,900 lives lost.
June 10	Italy: Paolo Boselli succeeds Antonio Salandra as Prime Minister.	Details
	The Siege of Medina begins.
June 10 – July 4	Battle of Mecca, Arabs capture the city.	Details
June 12	Percy Sykes marches on Kerman to link up with the Russian forces in central-northern Persia.
June 30	Battle of the Boar's Head, diversion from the Battle of the Somme which began the next day.
July	Battle of Taif.	Details
July 1	The Battle of the Somme begins.	Details
July 1–3	The Social Democratic Party wins a majority in the parliament of the Russian-ruled Grand Duchy of Finland.	Details
July 1–13	Second Battle of Albert (Opening phase of the Battle of the Somme).	Details
July 1–2	British capture Fricourt during the Second Battle of Albert.	Details
July 2	Ottoman counter-attack into Persia reaches Kermanshah.	Details
July 2–25	Battle of Erzincan.
July 3–7	British capture La Boisselle during the Second Battle of Albert.	Details
July 3–12	British capture Mametz Wood during the Second Battle of Albert.	Details
July 3–17	British capture Ovillers during the Second Battle of Albert and Battle of Bazentin Ridge.	Details
July 4–6	Battle of Kostiuchnowka.
July 7–11	British capture Contalmaison during the Second Battle of Albert.	Details
July 8–14	British capture Trônes Wood during the Second Battle of Albert.	Details
July 14–17	Battle of Bazentin Ridge (Initial phase of the Battle of the Somme)	Details
July 14 – September 15	Battles for Longueval and Delville Wood (Initial phase of the Battle of the Somme)	Details
July 19–20	Battle of Fromelles (Initial phase of the Battle of the Somme).
July 23 – August 7	Battle of Pozières (Initial phase of the Battle of the Somme)	Details
July 24 – August 8	Battle of Kowel.
July 30	German agents sabotage munition factories in Jersey City that supply the Allies, causing the Black Tom explosion.
August 3–5	Battle of Romani. Ottoman attack on the British in the Sinai peninsula fails.	Details
August 6–17	Sixth Battle of the Isonzo. The Italians capture Gorizia (August 9).	Details
August 6	Battle of Doberdo, part of the Sixth Battle of Isonzo.
August 9–18	First battle of Doiran.	Details
August 10	Ottomans take Hamadan.	Details
August 24	Battle of Mlali.
August 27	Romania enters the war on the Entente's side. Her army is defeated in a few weeks.
August 27 – December	Conquest of Romania by Central Powers.	Details
August 27 – November 26	Battle of Transylvania, a phase of the conquest of Romania.
August 28	Italy declares war on Germany.[23][48]
August 29	Paul von Hindenburg replaces Erich von Falkenhayn as German Chief of Staff.	Details
August 30	The Ottoman Empire declares war on Romania.[23]
September 1	Bulgaria declares war on Romania.[23]
September 2–6	Battle of Turtucaia, a phase of the conquest of Romania.
September 3–6	Battle of Guillemont (intermediate phase of the Battle of the Somme)	Details
September 5–7	Battle of Dobrich, a phase of the conquest of Romania.
September 6	The Central Powers create a unified command.
September 7–11	Battle of Kisaki.
September 8–19	Battle of Tabora.
September 9	Battle of Ginchy (intermediate phase of the Battle of the Somme)	Details
September 9–11	Battle of Dutumi.
September 12 – December 11	Monastir Offensive, set up of the Salonika Front.
September 12–14	Battle of Malka Nidzhe, a phase of the Monastir Offensive.
September 12–30	Battle of Kaymakchalan, a phase of the Monastir Offensive.
September 14–17	Seventh Battle of the Isonzo
September 15–22	Battle of Flers-Courcelette; the British use armored tanks for the first time in history.	Details
September 17–19	First Battle of Cobadin, a phase of the conquest of Romania.
September 20	The Brusilov Offensive ends with a substantial Russian success.	Details
September 25–28	Battle of Morval (part of the final stages of the Battle of the Somme)	Details
September 26–28	Battle of Thiepval Ridge (part of the final stages of the Battle of the Somme)	Details
September 29 – October 5	Flamanda Offensive, a phase of the conquest of Romania.
October–November	First Battle of the Cerna Bend, a phase of the Monastir Offensive.	Details
October 1 – November 5	Battle of Le Transloy (last stage of the Battle of the Somme)	Details
October 1 – November 11	Battle of Ancre Heights (last stage of the Battle of the Somme).
October 9–12	Eighth Battle of the Isonzo.
October 14 - January 6, 1917	Battle of Kibata.
October 19–25	Second Battle of Cobadin, a phase of the conquest of Romania.
October 24	The French recapture Fort Douaumont near Verdun.	Details
November 1–4	Ninth Battle of the Isonzo.
November 11	Battle of Matamondo.
November 13–18	Battle of the Ancre (closing phase of the Battle of the Somme)	Details
November 18	The Battle of the Somme ends with enormous casualties and an Anglo-French advantage.	Details
November 21	HMHS Britannic sinks after hitting a German mine	Details
	Francis Joseph I, Emperor of Austria and King of Hungary, dies and is succeeded by Charles I.	Details
November 25	David Beatty replaces John Jellicoe as commander of the Grand Fleet. Jellicoe becomes First Lord of the Sea.	Details
November 25 – December 3	Battle of Bucharest, a phase of the conquest of Romania.
November 28	Prunaru Charge, a phase of the Battle of Bucharest, Romanian cavalry desperately charge into enemy lines.
December 1	Battle of the Arges, a phase of the Battle of Bucharest.
December 1 – January 18, 1917	Allies capture Yanbu.	Details
December 3–6	In a four-day crisis December 3–6, 1916, H. H. Asquith is unaware how fast he is losing support. David Lloyd George now has growing Unionist support, the backing of Labour and (thanks to Christopher Addison) a majority of Liberal MPs. Asquith falls.	Details
December 7–31	The new Prime Minister Lloyd George answers the loud demands for a much more decisive government. He energetically sets up a new small war cabinet, a cabinet secretariat under Maurice Hankey, a secretariat of private advisors in the 'Garden Suburb' and moved towards prime ministerial control.[61]	Details
December 6	The Germans occupy Bucharest. The capital of Romania moved to Iaşi.	Details
December 13	Robert Nivelle replaces Joseph Joffre as Commander-in-Chief of the French Army.	Details
December 17	Kaocen Revolt: The Tuareg besiege the French garrison at Agadez.
December 18	Battle of Verdun ends with enormous casualties on both sides.
December 23	Battle of Magdhaba in the Sinai peninsula.[62]	Details
December 23–29	Christmas Battles.
December 27	Togoland is divided into British and French administrative zones.	Details
December 30	Grigori Rasputin, Russia's éminence grise, is assassinated.	Details

1917

Dates	Events
January 3–4	Battle of Behobeho.
January 9	Battle of Rafa. The British drive the Ottomans out of Sinai.	Details
January 11 – March 13	British raid the Ancre.	Details
January 16	The German Foreign Secretary Arthur Zimmermann sends a telegram to his ambassador in Mexico, instructing him to propose to the Mexican government an alliance against the United States.	Details
February 1	Germany resumes unrestricted submarine warfare.	Details
February 3	SS Housatonic an American steamer carrying wheat from Galveston, Texas to England is sunk by a U-boat.
February 13	Mata Hari is arrested in Paris on charges of spying for the Germans.
February 23	Second Battle of Kut. The British recapture the city.	Details
February 23 – April 5	The Germans withdraw to the Hindenburg Line.	Details
March 1	Arz von Straussenberg replaces Conrad von Hötzendorf as Austro-Hungarian Chief of Staff.	Details
March 3	The French relieve Agadez.
March 8–11	The British capture Baghdad.	Details
March 8	The celebrations of the International Women's Day in Petrograd spawn severe protests that will evolve into the February Revolution.
March 12	Russian troops refuse to fire on demonstrators after 50 are killed in Petrograd's Znamenskaya Square the day before. Numerous attacks against prisons, courts, police stations and Okhrana offices. Provisional Committee of the Duma formed. Petrograd Soviet formed.
March 13	Battle of Nambanje.
March 13 – April 23	Samarrah Offensive, British capture much of Mesopotamia.
March 14	China severs relations with Germany.[23]
March 15	Nicholas II abdicates. A provisional government is formed.
March 16	Lenin arrives in Petrograd from his exile in Switzerland and publishes his April Thesis.
March 17	Aristide Briand resigns as Prime Minister of France; he is replaced by Alexandre Ribot.
March 26	First Battle of Gaza. The British attempt to capture the city fails.[63]	Details
April–October	Stalemate in Southern Palestine.
April 2–3	Australians attack Noreuil.	Details.
April 6	The United States declares war on Germany.[64]	Details
April 7	Cuba declares war on Germany.[23]
	Panama declares war on Germany.[23]
	Scuttling of SMS Cormoran in Guam, the only hostile action between American and German forces in the Pacific.
April 9 – May 17	Second Battle of Arras. The British attack a heavily fortified German line without obtaining any strategic breakthrough.[65]	Details
April 9–12	The Canadians obtain a significant victory in the Battle of Vimy Ridge, part of the first phase of the Second Battle of Arras.[66]	Details
April 9–14	First Battle of the Scarpe, part of the first phase of the Second Battle of Arras.	Details
April 10–11	First Battle of Bullecourt,part of the first phase of the Second Battle of Arras.	Details
April 11	Brazil severs relations with Germany.[23]
April 13	Bolivia severs relations with Germany.[23]
April 15	Battle of Lagnicourt, part of the Second phase of the Second Battle of Arras.	Details
April 16 – May 9	The Second Battle of the Aisne (also known as Nivelle Offensive) ends in disaster for both the French army and its commander Robert Nivelle.[67]	Details
April 17–20	Battle of the Hills (also known as Third battle of Champagne), a diversion to the Second Battle of the Aisne.
April 19	Second Battle of Gaza. The Ottoman lines resist a British attack.	Details
April 22 – May 8	Second Battle of Doiran.	Details
April 23	The Ottoman Empire severs relations with the United States.[23]
April 23–24	Second Battle of Scarpe, part of the second phase of the Second Battle of Arras.	Details
April 28–29	Battle of Arleux, part of the Second phase of the Second Battle of Arras.	Details
April 29 – May 20	Series of mutinies in the French army.[68]	Details
May 3–4	Third battle of the Scarpe, part of the second phase of the Second Battle of Arras.	Details
	Mass demonstrations in Petrograd and Moscow to protest Pavel Milyukov's note affirming Russia's commitment to the Entente war effort.	Details
May 3–17	Second Battle of Bullecourt, part of the second phase of the Second Battle of Arras.	Details
May 5	Australian Prime Minister Billy Hughes wins an enlarged majority in federal elections with the pro-conscription Nationalist Party.	Details
May 5–15	Allied Spring offensive on the Salonika Front.
May 5–9	Second Battle of the Cerna Bend, a phase of the Allied Spring Offensive.	Details
May 12 – June 6	Tenth Battle of the Isonzo.	Details
May 15	Philippe Pétain replaces Robert Nivelle as Commander-in-Chief of the French Army.[69]	Details
May 23	Battle of Mount Hermada in the Karst.
	Salonika Trial ends: Dragutin Dimitrijevic, chief conspirator of the Sarajevo Assassination, is sentenced to death by Serbia on trumped up charges, as part of negotiations for a peace treaty with Austria-Hungary.
June–October	Operation Hush, Abortive British plan to capture coast of Belgium.
June 7–14	Second Battle of Messines, the British blow 19 deep mines and recapture Messines Ridge.	Details
June 10–29	Battle of Mount Ortigara.	Details
June 12	Constantine I of Greece abdicates.[70]
June 13	First successful heavy bomber raid on London done by the Gotha G.IV.
June 25	First American troops land in France.	Details
June 27	Batterie Pommern aka. 'Lange Max', world's largest gun fires for the first time from Koekelare to Dunkirk (±50 km).
June 30	Greece declares war on the Central powers.	Details
July 1–2	Battle of Zborov, a phase of the Kerensky Offensive.	Details
July 1–12	Brief monarchist coup and restoration in China, allegedly promoted by Germany to distance China from the Entente.	Details
July 1–19	The Kerensky Offensive fails. It is the last Russian initiative in the war.[71]	Details
July 6	Arab rebels led by Lawrence of Arabia seize the Jordanian port of Aqaba.[72]	Details
July 11	The Open Letter to Albert I is published by Flemish Movement sympathisers within the Belgian Army on the Yser Front, complaining about official discrimination against Dutch language	Details
July 16–17	Petrograd July Days.
July 19	The Reichstag passes a Peace Resolution.
July 20	Corfu Declaration about the future Kingdom of Yugoslavia.[73]	Details
July 21	Alexander Kerensky replaces Georgy Lvov as Minister-President of the Russian Provisional Government.
July 22	Siam declares war on Germany and Austria-Hungary.[23]
July 22 – August 1	Battle of Mărăști
July 29	Battle of Kiawe Bridge.
July 31	The Third Battle of Ypres (also known as Battle of Passchendaele) begins.	Details
July 31 – August 2	Battle of Pilckem Ridge (Opening phase of the Third Battle of Ypres).
August 2	The German raider SMS Seeadler is wrecked at Mopelia in French Polynesia.
August 2–10	Battle of Rumbo.
August 4	Liberia declares war on Germany.
August 6–20	Battle of Mărăşeşti.	Details
August 8–22	Third Battle of Oituz.
August 14	China declares war on Germany and Austria-Hungary.[74][23]
August 15–25	Battle of Hill 70 (Continuation of British operations near Lens).
August 16–18	Second Battle of Langemarck (Initial phase of the Third Battle of Ypres).	Details
August 17	China terminates the German and Austro-Hungarian concessions in Tianjin and occupies them.
August 18–28	Eleventh Battle of the Isonzo.	Details
August 20–26	Second Offensive Battle of Verdun.
September – October	Operation Albion. German capture of Oesel, Dago and Moon Islands.
September 1–3	Battle of Jugla.
September 5	The SMS Seeadler's crew sail to Fiji in a lifeboat and capture the French schooner Lutece, allowing their escape. They rename it Fortuna.
September 5–12	The Third Zimmerwald Conference of the anti-war socialist Zimmerwald Movement, is held in Stockholm.	Details
September 8–12	Russia: General Kornilov's coup attempt fails.	Details
September 12	Alexandre Ribot resigns as Prime Minister of France; he is replaced by Paul Painlevé.
September 14	Russia declared a republic.
September 20–26	Battle of the Menin Road Ridge (Second phase of the Third Battle of Ypres).
September 21	Costa Rica severs relations with Germany.[23]
September 26–27	Battle of Polygon Wood (Second phase of the Third Battle of Ypres).
September 28–29	Battle of Ramadi, Mesopotamia.	Details
October 4	Battle of Broodseinde (Second phase of the Third Battle of Ypres).
October 5	The Fortuna wrecks at Easter Island and its crew is interned by the Chileans.
October 6	Peru severs relations with Germany.[23]
October 7	Uruguay severs relations with Germany.[23]
October 9	Battle of Poelcappelle (Last phase of the Third Battle of Ypres).
October 12	First Battle of Passchendaele (Last phase of the Third Battle of Ypres).
October 15	Mata Hari executed.
October 15–18	Battle of Mahiwa.
October 23	Battle of Wadi Musa.
October 23 – November 10	Battle of La Malmaison, much-postponed French attack on the Chemin des Dames.	Details
October 24 – November 4	Battle of Caporetto. The Austro-Hungarians and Germans break through the Italian lines. The Italian army is defeated and falls back on the Piave River.	Details
October 26	Brazil declares war on Germany.[23]
October 26 – November 10	Second Battle of Passchendaele (Last phase of the Third Battle of Ypres).
October 27	Battle of Buqqar Ridge.
October 30	Italy: Vittorio Emanuele Orlando succeeds Paolo Boselli as Prime Minister.	Details
October 31 – November 7	Third Battle of Gaza. The British break through the Ottoman lines.	Details
October 31	Battle of Beersheba (opening phase of the Third Battle of Gaza).	Details
November 1–6	Battle of Tel el Khuweilfe.
November 2	Balfour Declaration: the British government supports plans for a Jewish "national home" in Palestine.	Details
November 5	The Allies agree to establish a Supreme War Council at Versailles.
November 7	October Revolution: Kerensky flees Petrograd just before the Petrograd Soviet seizes the Winter Palace.
	Charge at Sheria.
November 8	Armando Diaz replaces Luigi Cadorna as Commander-in-Chief of the Italian Army.	Details
	Charge at Huj.
November 9 – December 28	First Battle of the Piave: the Austro-Hungarians and Germans try unsuccessfully to cross the river.	Details
November 10	The Third Battle of Ypres (also known as Battle of Passchendaele) ends.	Details
November 11 – December 23	First Battle of Monte Grappa, Austro-Hungarian offensive halted.
November 13	France: Paul Painlevé is replaced by Georges Clemenceau as Prime Minister.	Details
	Battle of Mughar Ridge.
November 14	Battle of Ayun Kara.
November 17	Second Battle of Heligoland Bight, North Sea.	Details
November 17 – December 30	Battle of Jerusalem. The British enter the city (December 11).	Details
November 18–24	Battle of Nebi Samwil, a phase of the Battle of Jerusalem.
November 19	Battle of Caporetto ends. Central Powers take a quarter of a million prisoners.	Details
November 20 – December 3	First Battle of Cambrai. A British attack and the biggest German attack against the British since 1915 succeed and the battle is a stalemate.[75]	Details
November 25	Battle of Ngomano, the Germans invade Portuguese East Africa to gain supplies.
December 1	Battle of El Burj, a phase of the Battle of Jerusalem.
December 6	Halifax Explosion: An accidental collision between the Norwegian supply ship SS Imo and the French cargo ship SS Mont-Blanc, laden with high explosives for the Western Front, leaves 2,000 dead and 9,000 injured in Richmond, Nova Scotia. It is the largest man-made explosion before the invention of atomic weapons.
December 6	Finland declares independence from Russia.
December 7	The United States declares war on Austria-Hungary.[23]
December 8	Ecuador severs relations with Germany.[23]
December 9	Romania signs an armistice with the Central Powers.
December 10	Panama declares war on Austria-Hungary.[23]
December 11	General Allenby leads British and Indian troops into Jerusalem, ending 400 years of Ottoman rule.
December 15	Armistice between Russia and the Central Powers, to take effect on December 17.
December 16	Armistice of Erzincan between the Ottomans and the Russian Special Transcaucasian Committee.
December 17	Canadian Prime Minister Robert Borden wins an enlarged majority in federal elections with the pro-conscription Unionist Party.	Details
December 20–21	Battle of Jaffa, a phase of the Battle of Jerusalem.	Details

1918

Dates	Events
January 8	Woodrow Wilson outlines his Fourteen Points.	Details
February to September	Allied forces occupy the Jordan Rift Valley.	Details
February 9	The Central Powers sign an exclusive protectorate treaty with the Ukrainian People's Republic as part of the negotiations in Brest-Litovsk.	Details
February 15–16	Battle of Rarancza.
February 18 – March 3	Operation Faustschlag, last offensive on Eastern Front.
February 19	British begin their assault on Jericho.	Details
February 21	The British capture Jericho.	Details
	Germans capture Minsk.	Details
February 24	Germans capture Zhytomyr.	Details
February 25	German troops capture Tallinn.	Details
February 28	Germans capture Pskov and Narva.	Details
March 2	Germans capture Kiev.	Details
March 3	At Brest-Litovsk, Leon Trotsky signs the peace treaty with Germany.[76]	Details
March 4	First known case of what will later be called Spanish flu: Private Albert Gitchell at Camp Funston, Fort Riley, Kansas.
March 7	German artillery bombard the Americans at Rouge Bouquet.	Details
March 8–12	Battle of Tell 'Asur.
March 8–13	Battle of Bakhmach.
March 11	Over 100 sick from Spanish flu in Fort Riley; first known case outside in Queens, New York.
March 21 – April 5	First phase of the Spring Offensive, Operation Michael (also known as Second Battle of the Somme). The Germans obtain a Pyrrhic victory.	Details
March 21–23	The Battle of St. Quentin, first phase of Operation Michael and of the Spring Offensive.	Details
March 21 – April 2	First Transjordan attack on Amman.
March 23 – August 7	Artillery bombardment of Paris.	Details
March 24–25	First Battle of Bapaume, a phase of Operation Michael.	Details
March 25	First Battle of Noyon, a phase of Operation Michael.	Details
March 26	French Marshal Ferdinand Foch is appointed Supreme Commander of all Allied forces.	Details
March 26–27	Battle of Rosieres, a phase of Operation Michael.	Details
	Action of Khan Baghdadi.
March 25	Penza Agreement: The Czechoslovak Legion is given free passage to Vladivostok to join the Entente in return for surrendering most weapons to the Bolsheviks.
March 27–31	First Battle of Amman, a phase Of The First Transjordan Attack.
March 28	Third Battle of Arras (also known as First Battle of Arras (1918)), a phase of Operation Michael.	Details
March 30 – April 5	First Battle of Villers-Bretonneux, a phase of Operation Michael.
March 30	Battle of Moreuil Wood.
April 1	Royal Air Force founded by combining the Royal Flying Corps and the Royal Naval Air Service.
April 4–5	Battle of the Avre, final phase of Operation Michael.
April 7–29	Second phase of the Spring Offensive, Operation Georgette (also known as Battle of the Lys). The results are disappointing for the Germans.	Details
April 7–9	Battle of Estaires, first phase of Operation Georgette.	Details
April 10–11	Third Battle of Messines, a phase of Operation Georgette.	Details
April 12–13	Battle of Hazebrouck, a phase of Operation Georgette.	Details
April 13–15	Battle of Bailleul, a phase of Operation Georgette.	Details
April 14	Ottokar Czernin resigns as Austria-Hungary's Foreign Minister over the Sixtus Affair.
April 17–19	First Battle of Kemmelberg, a phase of Operation Georgette.	Details
April 18	Battle of Bethune, a phase of Operation Georgette.	Details
April 21	The Red Baron is shot down over Vaux-sur-Somme.
April 23	Guatemala declares war on Germany.[23]
April 24–27	Second Battle of Villers-Bretonneux, a phase of Operation Georgette.
April 25–26	Second Battle of Kemmelberg, a phase of Operation Georgette.	Details
April 28	Gavrilo Princip dies in Terezín prison, from tuberculosis.
April 29	Battle of Scherpenberg, final phase of Operation Georgette.	Details
April 30 – May 4	Second Transjordan attack on Shunet Nimrin and Es Salt.
May 7	Treaty of Bucharest between Romania and the Central Powers. It will never be ratified.	Details
May 8	Nicaragua declares war on Germany and Austria-Hungary.[23]
May 10–11	Battle of Kaniow.
May 14	Clash at Chelyabinsk station between Hungarian POWs heading west to be repatriated and Czechoslovaks going east. Trotsky orders the arrest of the Czechoslovak Legion, but they revolt and seize several towns along the Trans-Siberian Railway.	Details
May 21	Ottomans invade Armenia.	Details
May 21–29	Battle of Sardarabad, a phase of the invasion of Armenia.
	Battle of Abaran, a phase of the invasion of Armenia.
May 23	Costa Rica declares war on Germany.[23]
May 24–28	Battle of Karakilisa, a phase of the invasion of Armenia.
May 27 – June 6	Third Battle of the Aisne (also known as Operation Blücher-Yorck, third phase of the Spring Offensive). After initial gains, the German advance is halted.	Details
May 28	Battle of Cantigny.
May 29–31	Battle of Skra-di-Legen
June 1–26	Battle of Belleau Wood, part of the German Spring Offensive.
June 8	Action of Arsuf.
	Ottomans re-enter Tabriz.	Details
June 8	The Czechoslovak Legion forms the Committee of Members of the Constituent Assembly in Samara. Stanislav Čeček calls to join forces with anti-Bolshevik Russians to overthrow the Communist government and reignite the Eastern Front.	Details
June 8 – October	Germany interferes in the Caucasus.	Details
June 9–12	Fourth phase of the Spring Offensive, Operation Gneisenau (also known as Battle of Matz). Despite substantial territorial gains, the Germans do not achieve their strategic goals	Details
June 13	Provisional Siberian Government formed in Omsk.
June 15–23	Second Battle of the Piave: the Austro-Hungarian offensive is repelled.	Details
June 15–31	Ottomans occupy Dilman, Khoy and Urmia.	Details.
June 23	British and French troops land at Murmansk in Northern Russia. It's the beginning of Allied Intervention in the Russian Civil War on the White Army's side.	Details.
July 4	Battle of Hamel.
July 12	Haiti declares war on Germany.[23]
July 14	Battle of Abu Tellul.
July 15 – August 6	Second Battle of the Marne and last German offensive on the Western Front, which fails when the Germans are counterattacked by the French.	Details
July 15–17	Champagne-Marne Offensive (consisting of the Fourth Battle of Champagne and the Battle of the Mountain of Reims), a phase of the Second Battle of the Marne. last phase of the Spring Offensive and last German offensive of World War I.	Details
July 17	Nicholas II and his family are executed by the Bolsheviks, out of fear that they might be released by Czechoslovak and White troops.	Details
July 18	Battle of Chateau-Thierry, a phase of the Second Battle of the Marne.	Details
July 18–22	Battle of Soissons,a phase of the Second Battle of the Marne.	Details
July 19	Battle of Tardenois, a phase of the Second Battle of the Marne.
	Honduras declares war on Germany.[23]
August	Spanish flu virus mutates: Simultaneous deadlier outbreaks in Brest, Freetown and Boston.
August 5	The Czechoslovak People's Army of Komuch takes Kazan from the Bolsheviks and captures the Imperial Russian gold reserve.	Details
August 8 – November 11	Hundred Days Offensive, last offensive on Western Front.
August 8–12	Battle of Amiens, first phase of the Hundred Days Offensive.	Details
August 9–12	Battle of Montdidier.
August 13 – September 3	Battle of San Matteo.
August 17–29	Second Battle of Noyon, a phase of the Hundred Days Offensive.	Details
August 21 – September 3	Second Battle of the Somme(also known as Third battle of the Somme), a phase of the Hundred Days Offensive.	Details
August 21–22	Third Battle of Albert, opening phase of the Second Battle of the Somme.	Details
August 21 – September 3	Second Battle of Bapaume, a phase of the Second Battle of the Somme.
August 26 – September 3	Fourth Battle of Arras (also known as Second Battle of Arras (1918)), a phase of the Second Battle of the Somme	Details
August 26–30	Fourth Battle of the Scarpe (also known as Battle of the Scarpe (1918)), a phase of the Fourth Battle of Arras.	Details
August 26 – September 14	Battle of Baku, last Turkish offensive of the war.
August 30–31	Battle of Lioma.
August 31 – September 3	Battle of Mont Saint-Quentin, a phase of the Second Battle of the Somme.
September 1–2	Battle of Peronne, a phase of the Battle of Mont Saint-Quentin.	Details
September 2–3	Battle of Drocourt-Queant Line, final phase of the Second Battle of the Somme.	Details
September 8–23	Ufa Conference: Formation of the Provisional All-Russian Government with the support of the Czechoslovak Legion.
September 10	Battle of Savy-Dallon, a phase of the Hundred Days Offensive.	Details
September 12	Battle of Havrincourt, a phase of the Hundred Days Offensive.	Details
September 12–19	Battle of Saint-Mihiel, a phase of the Hundred Days Offensive.
September 14	Battle of Vauxaillon, a phase of the Hundred Days Offensive.	Details
September 14–29	Vardar Offensive, final offensive on the Balkan Front.
September 15	The Allies (French and Serbs) break through the Bulgarian lines at Dobro Polje, a phase of the Vardar Offensive.	Details
September 18	Battle of Epehy, a phase of the Hundred Days Offensive.
September 18–19	Third Battle of Doiran, a phase of the Vardar Offensive, The Bulgarians halt the British and Greek advance.	Details
September 18 – October 17	Battle of the Hindenburg Line, a phase of the Hundred Days Offensive. The Allies break through the German lines.	Details
September 19–25	Battle of Megiddo. The British conquer Palestine.	Details
	Battle of Nablus, a phase of the Battle of Meggido.	Details
	Third Transjordan attack, a phase of the Battle of Nablus.
	Battle of Sharon, a phase of the Battle of Megiddo.
September 22	The British capture Jisr ed Damieh in the Battle of Sharon.	Details
September 25	The British capture Tiberias during the Battle of Sharon.	Details
September 19	Battle of Tulkarm, a phase of the Battle of Sharon.
	Battle of Arara, a phase of the Battle of Sharon.
September 19–20	Battle of Tabsor, a phase of the Battle of Sharon.
September 20	Capture of Jenin, a phase of the Battle of Sharon.
	British capture both Afulah and Beisan during the Battle of Sharon.	Details
September 20–21	Battle of Nazareth, a phase of the Battle of Sharon.
September 23	Battle of Haifa, a phase of the Battle of Sharon.	Details
September 25	Battle of Samakh, a phase of the Battle of Sharon.
	Second Battle of Amman, a phase of the Third Transjordan Attack.
September 26 – November 11	Meuse-Argonne Offensive, the final phase of the Hundred Days Offensive and of World War I.	Details
September 26 – October 1	The British enter Damascus.	Details
September 26	Battle of Somme-Py (Initial phase of the Meuse-Argonne Offensive).	Details
	Charge at Irbid, a phase of the Capture of Damascus.
September 26–27	British capture Deraa during the Capture of Damascus.	Details
September 27	Battle of Jisr Benat Yakub, a phase of the Capture of Damascus.
September 27 – October 1	Battle of the Canal du Nord, a phase of the Battle of the Hindenburg Line.
September 28 – October 2	Fifth Battle of Ypres (also known as Advance on Flanders), a phase of the Battle of the Hindenburg Line.
September 29 – October 10	Battle of St. Quentin Canal, a phase of the Hundred Days Offensive.
September 30	Bulgaria signs an armistice with the Allies.[77]
	Battle of Saint-Thierry (Initial phase of the Meuse-Argonne Offensive).	Details
	Charge at Kaukab, a phase of the Capture of Damascus.
	Charge at Kiswe, a phase of the Capture of Damascus.
October 3	Tsar Ferdinand I of Bulgaria abdicates and Boris III accedes to the throne.
October 3–27	Pursuit to Haritan.
	Battle of Blanc Mont Ridge.
October 4	Germany requests an Armistice to U.S. President Woodrow Wilson. He demands German withdrawal from all occupied territory, and the Kaiser's abdication.
October 8–10	Second Battle of Cambrai (also known as Battle of Cambrai (1918)), a phase of the Battle of the Hindenburg Line.	Details
October 14–17	Battle of Montfaucon (intermediate phase of the Meuse-Argonne Offensive).	Details
October 14–19	Battle of Courtrai, closing phase of the Hundred Days offensive.	Details
October 15	Battle of Mont-D'Origny, a phase of the Hundred Days Offensive.	Details
October 17–26	Battle of the Selle, closing phase of the Hundred Days Offensive.
October 20	Germany suspends submarine warfare.	Details
	Battle of Lys and Escaut (Which included the Second Battle of Lys and the Battle of the Escaut), a phase of the Hundred Days Offensive.	Details
	Battle of Serre, a phase of the Hundred Days Offensive.	Details
October 23–30	Battle of Sharqat.
October 24 – November 4	Battle of Vittorio Veneto. The Austro-Hungarian army is routed. The Italians enter Trent and land at Triest.	Details
October 24–28	Second Battle of Monte Grappa, beginning phase of Vittorio Veneto.
October 25	Battle of Aleppo.	Details
October 29	Wilhelm Groener replaces Erich Ludendorff as Hindenburg's deputy.	Details
	Germany's Hochseeflotte mutinies.[78]	Details
	State of Slovenes, Croats and Serbs proclaimed.	Details
October 30	The Ottoman Empire signs the Armistice of Mudros.	Details
November	First Spanish flu cases in Spain, where reports on the disease are published freely due to the lack of wartime censorship.
November 1	Battle of Chesne (Closing phase of the Meuse-Argonne Offensive).	Details
November 1–2	Battle of Valenciennes, closing phase of the Hundred Days Offensive.	Details
November 3	Austria-Hungary signs the armistice with Italy, effective November 4.[79]
November 4	Battle of the Sambre, closing phase of the Hundred Days Offensive.	Details
	Second Battle of Guise, a phase of the Battle of Sambre.	Details
	Battle of Thierache, a phase of the Battle of Sambre.	Details
November 6–11	Advance to the Meuse.
November 9	Germany: Kaiser William II abdicates; republic proclaimed.[80]	Details
November 10	Austria-Hungary: Kaiser Charles I abdicates.	Details
	Romania renews the war against the Central Powers.[23]
November 11	At 6 am, Germany signs the Armistice of Compiègne. End of fighting at 11 a.m..[81]	Details
	Poland proclaimed.
November 12	Austria proclaimed a republic.
November 14	Czechoslovakia proclaimed a republic.	Details
	German U-boats interned.
	3 days after the armistice, fighting ends in the East African theater when General von Lettow-Vorbeck agrees a cease-fire on hearing of Germany's surrender.	Details
November 18	Alexander Kolchak seizes control of the Provisional All-Russian Government in a coup.
November 21	Germany's Hochseeflotte surrendered to the United Kingdom.[78]	Details
November 22	The Germans evacuate Luxembourg.
November 25	11 days after agreeing a cease-fire, General von Lettow-Vorbeck formally surrenders his undefeated army at Abercorn in present-day Zambia.	Details
November 27	The Germans evacuate Belgium.
December 1	Kingdom of Serbs, Croats and Slovenes proclaimed.	Details

1919

Dates	Events
January 5	Hermann Detzner surrenders at the Finschhafen District of New Guinea.
January 10	Fakhri Pasha surrenders at Medina.	Details
January 18	Treaty of Versailles between the Allies and Germany: the Peace Conference opens in Paris.[82]	Details
January 25	Proposal to create the League of Nations accepted.	Details
January 27	The Czechoslovak Legion assumes complete control of the Trans-Siberian Railway.
June 21	German High Seas Fleet (53 ships) scuttled in Scapa Flow with nine deaths, the last casualties of the war.[78]	Details
June 28	Treaty of Versailles signed.[83]	Details
July 8	Germany ratifies the Treaty of Versailles.[84]	Details
July 21	The United Kingdom ratifies the Treaty of Versailles.[85]	Details
November 10–11	A Banquet in Honour of The President of the French Republic is hosted by King George V and held at Buckingham Palace during the evening hours of November 10. The very first Armistice Day is held on the Grounds of Buckingham Palace on the Morning of November 11. This will set the trend for the later Remembrance Day.	Details
November 14	The Bolsheviks take Omsk. Kolchak's retreat east is impeded by the Czechoslovaks denying him use of the Trans-Siberian.

1920

Dates	Events
January 4	A coup in Irkutsk deposes Kolchak.	Details
January 10	First meeting of the League of Nations held in London. Official end of World War I.	Details
	Free City of Danzig established.[86]	Details
January 20	Irkutsk surrenders to the Bolsheviks.
January 21	The Paris Peace Conference ends.	Details
February 7	Armistice between the Bolsheviks and the Czechoslovak Legion. The Czechoslovaks surrender the Russian gold reserves and Kolchak in return for free passage to Vladivostok. Kolchak and his Prime Minister, Viktor Pepelyayev are executed.
February 10	A plebiscite returns Northern Schleswig to Denmark.[87]	Details
April 19–26	Conference of Sanremo, Italy, about League of Nations mandates in former Ottoman territories of the Middle East.	Details
June 4	Treaty of Trianon between the Allies and Hungary.	Details
August 10	Treaty of Sèvres between the Allies and the Ottoman Empire. The treaty is not recognized by the Turkish national movement, which considers the Istanbul government illegitimate.[88]	Details
September 8	Gabriele D'Annunzio proclaims in Fiume the Italian Regency of Carnaro.	Details
November 1	League of Nations headquarters moved to Geneva, Switzerland.	Details
November 12	Treaty of Rapallo between Italy and Yugoslavia. Zadar is annexed by Italy and the Free State of Fiume is established.	Details
November 15	The League of Nations holds its first general assembly.	Details

Post-1920

Dates	Events
1921
October 13	Treaty of Kars between Bolshevik Russia and Turkey.	Details
1922
February 6	Washington Naval Treaty, limiting naval tonnage, signed by France, Italy, Japan, the United Kingdom and the United States.	Details
April 10 – May 19	Genoa Conference. Representatives of 34 countries discuss economics in the wake of the Great War.	Details
April 16	Treaty of Rapallo between Germany and Bolshevik Russia to normalize diplomatic relations.	Details
September 11	Treaty of Kars ratified in Yerevan, Armenia.	Details
1923
June 16	The Russian Civil War ends.
July 24	Treaty of Lausanne between the Allies and Turkey, successor State to the Ottoman Empire. It supersedes the Treaty of Sèvres.[89]	Details
1924
January 27	Treaty of Rome between Italy and Yugoslavia. Fiume is annexed by Italy and the neighboring town of Sušak is assigned to Yugoslavia.	Details
2010
October 3	Germany makes final reparations payments.	Details

Notes

1. Albertini 1953, p. 38.
2. Keegan 1998, p. 53.
3. Lowe 1994, p. 202.
4. "Kriegserklärung [Declaration of War], Wiener Zeitung [Vienna Newspaper], July 28, 1914, Extraausgabe [Special Edition], Amtlicher Teil [Official Section], 19" (PDF).
5. "Kaiser Wilhelm of Germany and Czar Nicholas of Russia exchange telegrams - Jul 29, 1914 - HISTORY.com". Retrieved 2016-10-01.
6. "Historical Events on August 1". OnThisDay.com. Retrieved 2018-01-03.
7. Willmott 2003, p. 29.
8. "Telegramm des Reichskanzlers an den Kaiserlichen Botschafter in Petersburg von 1. August 12:52 p.m. Dringend [ Telegram from the Imperial Chancellor to the Imperial Ambassador in Petersburg, August 1, 12:52 p.m. Urgent], in Auswärtiges Amt [Foreign Office], Das Deutsche Weissbuch, über den Ausbruch des Deutsch-Russisch-Französischen Krieges, Nach dem dem Reichstag Vorgelegten Material [The German White Book, on the Outbreak of the German-Russian-French War, According to the Documents Provided to the Reichstag] (Neumünster/Leipzig: Nordische Velagsanstalt, R. Hieronymus, 1914), 46, Anlage [Annex] 26" (PDF).
9. "The Italian Declaration of Neutrality - World War I Document Archive". wwi.lib.byu.edu. Retrieved 28 March 2018.
10. "Denmark | International Encyclopedia of the First World War (WW1)". encyclopedia.1914-1918-online.net. Retrieved 2015-12-22.
11. The Treaty of Alliance Between Germany and Turkey 2 August 1914, Yale University
12. "Occupation of Luxembourg - International Encyclopedia of the First World War (WW1)". 1914-1918-online.net. Retrieved 28 March 2018.
14. "Der Reichskanzler an den Botschafter in Paris [The Imperial Chancellor to the Ambassador in Paris], August 3, 1914, in Auswärtiges Amt [Foreign Office], Die Deutschen Dokumente zum Kriegsausbruch [German Documents Relating to the Outbreak of the War], Band [vol.] III, Vom Bekanntwerden der Russischen Allgemeinen Mobilmachung bis Zur Kriegserklärung an Frankreich [From the Publication of the Russian Mobilization to the Declaration of War Against France], (Charlottenburg: Deutsche Verlagsgesellschaft für Politik und Geschichte, 1919), 185, No. 734" (PDF).
15. Keegan 1998, p. 69.
16. "Note remise par M. [Julien] Davignon, Ministre des Affaires étrangères, à M. de Below Saleske, Ministre d'Allemagne, Bruxelles, le 3 août 1914 (7 heures du matin) [Note Given by M. [Julien] Davignon, Minister of Foreign Affairs, to M. de Below Saleske, Minister of Germany, Brussels, August 3, 1914, 7 in the morning], in Documents Diplomatiques 1914: La Guerre Européenne (Paris: Ministère des Affaires Étrangères, 1914), 202" (PDF).
17. "August 1914: the outbreak of war". Switzerland and the First World War. Retrieved 2015-12-22.
18. F.A. Kuenzli, Right and Duty, or Citizen and Soldier: Switzerland Prepared and at Peace, A Model for the United States (New York: National Defense Institute, 1916), 94.
19. "Invasion of Belgium". Spartacus.schoolnet.co.uk. Archived from the original on 2013-11-18. Retrieved 2013-11-13.
20. "Daily Mirror Headlines: The Declaration of War, Published 4 August 1914". bbc.co.uk. Retrieved 9 February 2010.
21. "Historians attempt to find WWI's first shot deep in Australian waters". ABC. Retrieved 16 September 2014.
22. Neiberg 2005, pp. 54–55.
23. Duffy 2009. sfn error: multiple targets (2×): CITEREFDuffy2009 (help)
24. "Así se vivió la grerra en España". elmundo.es. Retrieved 28 March 2018.
25. https://ifc.dpz.es/recursos/publicaciones/35/22/10pereira.pdf
26. "Montenegro Declares War on Germany". World History Project. Retrieved 2016-06-17.
27. "Declaration of War Against Austria-Hungary, Aug. 12, 1914 The war against Austria-Hungary was declared on August 12, 1914, and the Declaration was published in the London Gazette on the following day. Foreign Office, Notice of State of War Between Great Britain and Austria-Hungary, August 12, 1914, Supplement to the London Gazette no. 28868 (August 13, 1914): 6375" (PDF).
28. Tucker 2005, p. 605.
29. Tucker 2005, p. 374.
30. Tucker 2005, p. 445.
31. Tucker 2005, p. 459.
32. Farwell 1989, p. 353.
33. "Austria-Hungary Declares War on Belgium". World History Project. Retrieved 2016-06-17.
34. "Петроград — Энциклопедия "Вокруг света"". www.vokrugsveta.ru. Retrieved 2017-11-13.
35. Creveld 1977, p. 121.
36. Tucker 2005, p. xviii.
37. Tucker 2005, p. 316.
38. "Foreign Office, Notice of State of War Between Great Britain and Turkey, November 5, 1914, London Gazette no. 28965 (November 6, 1914): 9011".
39. Tucker 2005, p. 943.
40. "Rusya Fransa ve İngiltere devletleriyle hal-i harb ilanı hakkında irade-i seniyye [Imperial Decree Concerning the Declaration of a State of War with the States of Russia, France, and the United Kingdom], Nov. 11, 1914 (29 Teşrin-i Evvel 1330), Takvim-i Vekayi, Nov. 12, 1914 (30 Teşrin-i Evvel 1330)" (PDF).
41. Tucker 2005, p. 407.
42. Tucker 2005, p. 578.
43. Tucker 2005, p. 1052.
44. Tucker 2005, p. 299.
45. Duffy, Michael (2009-08-22). "The Battle of Bolimov, 1915". Firstworldwar.com. Retrieved 2013-11-13.
46. Tucker 2005, p. 337.
47. Tucker 2005, p. 564.
48. "Italy Declares War on Germany". World History Project. Retrieved 2016-06-17.
49. Tucker 2005, p. 652.
50. Tucker 2005, p. 653.
51. Tucker 2005, p. 721.
52. Tucker 2005, p. 42.
53. Tucker 2005, p. 1139.
54. "Foreign Office, Notice of State of War Between Great Britain and Bulgaria, October 15, 1915, London Gazette no. 29333 (October 19, 1915): 10257–58".
55. Tucker 2005, p. 323.
56. Tucker 2005, p. 660.
57. Tucker 2005, p. 464.
58. Tucker 2005, p. 1061.
59. Tucker 2005, p. 1431.
60. Tucker 2005, p. 366.
61. Kenneth O. Morgan, "7 December 1916: Asquith, Lloyd George and the Crisis of Liberalism." Parliamentary History (2017) 36#3 pp 361-371.
62. Tucker 2005, p. 1092.
63. Tucker 2005, p. 467.
64. Tucker 2005, p. 1252.
65. Tucker 2005, p. 344.
66. Tucker 2005, p. 245.
67. Tucker 2005, p. 854.
68. Tucker 2005, p. 855.
69. Tucker 2005, p. 434.
70. Tucker 2005, p. 174.
71. Tucker 2005, p. 632.
72. Tucker 2005, p. 115.
73. Tucker 2005, p. 1286
74. http://www.history.com/this-day-in-history/china-declares-war-on-germany
75. Tucker 2005, p. 1283.
76. Tucker 2005, p. 225.
77. Tucker 2005, p. 242.
78. Gottschall 2003, p. 265.
79. Tucker 2005, p. 563.
80. Boemeke 1998, p. 85.
81. Boemeke 1998, p. 84.
82. Boemeke 1998, p. 478.
83. Boemeke 1998, p. 246.
84. Boemeke 1998, p. 414.
85. Boemeke 1998, p. 566.
86. Tucker 2005, p. 1223.
87. Tucker 2005, p. 349.
88. Tucker 2005, p. 126.
89. Tucker 2005, p. 674.

See also

• Diplomatic history of World War I

References

• Albertini, Luigi (1953). Origins of the War of 1914. Oxford: Oxford University Press. OCLC 168712.
• Boemeke, Manfred Franz (1998). The Treaty of Versailles: A Reassessment After 75 years. Cambridge University Press. ISBN 0-521-62132-1.
• Creveld, Martin van (1977). Supplying War: Logistics from Wallenstein to Patton. Cambridge University Press. ISBN 0-521-29793-1.CS1 maint: ref=harv (link)
• Duffy, Michael (2009-08-22), "Who Declared War and When", firstworldwar.com
• Evans, David (2004). The First World War. Teach yourself. London: Hodder Arnold. ISBN 0-340-88489-4. OCLC 224332259.CS1 maint: ref=harv (link)
• Farwell, Byron (1989). The Great War in Africa, 1914–1918. W.W. Norton. ISBN 978-0-393-30564-7.CS1 maint: ref=harv (link)
• Gottschall, Terrell D. (2003). By order of the Kaiser: Otto von Diederichs and the rise of the Imperial German Navy, 1865–1902. Naval Institute Press. ISBN 1-55750-309-5.CS1 maint: ref=harv (link)
• Halpern, Paul G. (1995). A Naval History of World War I. Routledge. ISBN 1-85728-498-4.
• Keegan, John (1998). The First World War. London: Hutchinson. ISBN 9780091801786.CS1 maint: ref=harv (link)
• Lowe, John (1994). The Great Powers, Imperialism, and the German Problem, 1865–1925. Routledge. ISBN 0-415-10444-0.CS1 maint: ref=harv (link)
• Neiberg, Michael S. (2005). Fighting the Great War: A Global History. Cambridge, Mass: Harvard University Press. ISBN 0-674-01696-3. OCLC 56592292.CS1 maint: ref=harv (link)
• Odgers, George (1994). 100 Years of Australians at War. Lansdowne. ISBN 1-86302-669-X.CS1 maint: ref=harv (link)
• Willmott, H.P. (2003). World War I. New York: Dorling Kindersley. ISBN 0-7894-9627-5. OCLC 52541937.CS1 maint: ref=harv (link)
• Tucker, Spencer (2005). World War I: encyclopedia. ABC-CLIO. ISBN 1-85109-420-2.CS1 maint: ref=harv (link)

Further reading

• Stephen Pope; Elizabeth-Anne Wheal (1995). "Select Chronology". Dictionary of the First World War. Macmillan. ISBN 978-0-85052-979-1.

External links

• "WWI Timeline". The Great War. USA: Public Broadcasting System.
• "WWI Timeline". USA: National World War I Museum.
• "World War One Timeline". UK: BBC.
• "New Zealand and the First World War (timeline)". New Zealand Government.
• "Timeline: Australia in the First World War, 1914-1918". Australian War Memorial.
• "World War I: Declarations of War from around the Globe". Law Library of Congress.
• "Timeline of the First World War on 1914-1918-Online. International Encyclopedia of the First World War". 1914-1918-Online. International Encyclopedia of the First World War.