Battle of Soissons (1918)

Battle of Soissons
	Part of the Western Front of World War I
Date	18–22 July 1918
Location	Northeastern France49°22′54″N 3°19′25″E
Result	Decisive Allied victory
Belligerents
France; United States; Great Britain;	German Empire
Commanders and leaders
Ferdinand Foch; Philippe Pétain; Émile Fayolle; Charles E. Mangin; Pierre Berdoulat; Albert Daugan; John J. Pershing; Robert L. Bullard; Charles P. Summerall; James G. Harbord;	Erich Ludendorff; Crown Prince Friedrich Ernst; Johannes von Eben; Wilhelm von Woyna; Hermann von Staabs; Oskar von Watter;
Strength
At least 345,000 men, 478 tanks	At least 234,000 men, 210 aircraft
Casualties and losses
95,000 casualties[lower-alpha 1][1]; Great Britain 13,000 casualties[lower-alpha 1][1]; 11,259 casualties[lower-alpha 1][2];	168,000 casualties[lower-alpha 1][3];

The Battle of Soissons (1918) (also known as the Battle of the Soissonnais and of the Ourcq (French: Bataille du Soissoinais et de L'Ourcq)[lower-alpha 2]) was a battle fought on the Western Front during World War I. Waged from 18 to 22 July 1918 between the French (with American and British assistance) and the German armies, the battle was part of the much larger Allied Aisne-Marne counter-offensive. It followed the final German Spring Offensive, Operation Marneschutz-Reims (also known as the Friedensturm or peace offensive). The primary objective of the attack was to cut both the Soissons – Château-Thierry road and the railroad running south from Soissons to Château-Thierry. As these were the main supply routes for the German forces in the Marne salient, cutting them would severely impair the Germans' ability to supply its armies defending it. This would force them to retreat and give up their gains.[4][5] This battle marked the turning point of the war as the Germans would be on the defensive for the remainder of the conflict.[6][7]

Background

The Russian withdrawal from the war after the Treaty of Brest-Litovsk on 3 March 1918 freed 42 German divisions which had been fighting on the Eastern Front, providing a temporary numeric advantage over the Allies on the Western Front.[8] The Germans realized their only remaining chance for victory on the Western Front was to defeat the Allies before the United States could be fully deployed.[9]

Beginning on 21 March 1918 the Germans launched a series of five offensives known as the 1918 Spring Offensive, or Kaiserschlacht (Kaiser’s Battle). The first two offensives, Michael and Georgette, were aimed at the British armies. The objectives were to separate the British and French forces, to push the British armies back to the English Channel and to cut the rail line through Hazebrouck, the main supply line for the British force.[10] Although successful in pushing the British back, Michael was unsuccessful in separating the French and British armies while Georgette was checked north of Hazebrouck and failed to cut the British supply line.[11]

The third offensive, Blücher-Yorck, was a diversionary thrust toward Paris to compel the French to move some of their reserves eastward away from the British. This would be accomplished by attacking the French Sixth Army along the Chemin des Dames ridge between Soissons and Reims.[12][13] This attack, while succeeding in pushing the French Sixth Army south to Château-Thierry and the northern bank of the Marne River, failed to draw French reserves away from the British.[14][15]

The fourth offensive, Gneisenau, was an attempt by the Germans to straighten the line from Noyon to Montdidier between the two large salients created by the first three offensives.[16] This would free men and materiel enabling a final thrust to end the war.[17] A second objective of the offensive was to gain control of the Compiegne-Reims rail line to ease logistical problems in supplying their armies in the Marne salient.[17] While the Germans in the center of the attack were able to cross the Matz River (about 7 mi (11 km) from their starting point), the attack failed to achieve either of the two main objectives.[18][17]

The fifth and final spring offensive, Marneschutz-Reims, was two-pronged, aimed at capturing Reims and its rail center, giving the Germans complete control of the Reims-Soissons rail line.[19] This would ease a logistics crisis the Germans were facing in the Marne salient.[20] While the Germans crossed the Marne west of Reims, the attack east of Reims was completely stopped by the evening of the first day.[21] Faced with complete failure, the Germans called off the attack by the evening of the second day.[22][19]

By the end of the Spring Offensive the German Army had occupied two vast salients on the Western Front. One salient was in the British sector between Arras on the Scarpe River and La Fère on the Oise River.[23] The second was in the French sector from just west of Reims in the east to Noyon in the west and south to Château-Thierry.[24]

Building and Training the American Army

When the American Army entered the war in 1917, it was in a woeful state of unpreparedness. It had approximately 285,000 Springfield rifles on hand, about 400 light field guns, 150 heavy field guns, and fewer than 1,500 machine guns of four non-interchangeable types.[25] Field Marshal Sir Douglas Haig, Commander-in-chief of the British forces in France, said there was enough American ammunition to support a regimental attack for about nine hours. In the aviation section there were 55 training airplanes all obsolete. Of the 65 officers and about 1000 men there were 35 officers who could fly, five of whom were combat ready.[26][27] Because America never recovered from the great loss in ships during its Civil War, it lacked the tonnage to transport men and materiel across the Atlantic in sufficient quantities to alter the course of the war.[28][29]

The U.S. Congress appropriated more than $300,000,000 in August 1916 for naval expansion and construction began on some small craft. The same Congress passed an act in June 1916 reorganize the U.S. Military forces. But until the U.S. actually entered the war nothing had been done to carry it out. Little if any action was taken to increase the size of the U.S. Army and no action was taken to equip or train it.[30]

Based on the recommendations put forth by the General Organization Project of 10 July 1917, also known as the Graves Project, combined with input from General John J. Pershing and his staff, an American division comprised roughly 28,500 men. This number included officers and was roughly twice the size of Allied and German divisions.[31][32][33] The reasoning behind these immense divisions was twofold. First, a larger division would be able to sustain heavier losses and stay in battle longer. Secondly, there were not enough experienced officers to command or fill staff positions. By making the divisions larger there would be fewer divisions requiring fewer commanders and staffs.[34][35]

American divisions arriving in France were made up mostly of raw recruits augmented by regulars who had never fired a Springfield rifle. Upon arrival, doughboys were subjected to a training regimen which began with a heavy dose of physical conditioning and drilling with emphasis on, as stated by General William L. Sibert, “development of a proper disciplinary spirit”. This portion of the training also included small unit tactics. The training then shifted to the practice trenches the doughboys dug in their training areas. Here they were taught the intracacies of the weapons they would be using as well as solutions to tactical problems in trench warfare. When training in the practice trenches was finished, the Americans were assigned a four-week stint in a quiet French or British sector to complete their trench warfare training. Here they became accustomed to life at the front. They went out into no man's land to listen for enemy activity, became familiar with body lice, fought off the trench rats and saw their first action. Prior to being committed to battle, Pershing had his men train at the division level with artillery and aviation in offensive maneuvers. The purpose of this portion of the training was to emphasize open warfare rather than trench warfare.[36]

By 16 July 1918, there were 26 American divisions in various states of readiness in France. Seven fully trained divisions were either in the line or near the Marne salient. There were five partially trained divisions in quiet sectors south of Verdun in the French sector and another five partially trained in quiet sectors between Ypres and Arras in the British sector. An additional five divisions were in training areas, two divisions were in depots, and two divisions just arrived. Of these divisions Pershing believed he had 17 divisions ready for service.[37]

Planning

On the evening of 30 May 1918, three days after the start of the Blucher-York offensive, General Pershing, Commander-in-chief of the American Expeditionary Forces in France, stopped at Sarcus to meet with General Ferdinand Foch, Supreme Allied Commander, and his staff. Recollecting the mood during dinner, Pershing commented, “It would be difficult to imagine a more depressed group of officers. They sat through the meal scarcely speaking a word.”[38][39] Meeting with Foch alone after dinner, Pershing suggested an early counterattack be made against the Marne salient to which Foch replied that was what he had in mind.[38][40]

On Saturday, 1 June, Pershing attended a meeting of the Supreme War Council in Versailles. During the two-day meeting there was a heated discussion over the shipment of American troops with both the British and French demanding that only infantry and machine gun units be shipped.[41] On 3 June, Pershing sent a cable to Newton Baker, Secretary of War, indicating the military situation in the Marne salient had become bleak with the French line giving way and the seven divisions occupying that portion of the front losing almost all their materiel and a large percentage of their personnel.[42]

Two weeks later, 14 June, after the American 1st Division took Cantigny, Foch wrote to General Philippe Pétain, commander of the Armies of the North and Northeast, “I have the honor to invite your attention to the importance of the communications net at Soissons, which is used for the supply of four German divisions on the front and which constitutes at the same time the sole junction point of all the railroads available to the enemy on the Aisne and south thereof.”[43]

Foch's letter to Pétain eventually reached General Charles Emmanuel Mangin, commander of the French Tenth Army. Mangin replied on 20 June with a summary plan for offensive operations to seize the plateau southwest of Soissons. From here long-range guns could subject the bridges and railroad network to a methodical and intensive bombardment.[44][45] He stressed the importance of possession of the ridge of Villers-Hélon stating “it is on the heights of Villers-Hélon, and not in the low ground at Longpont Brook, that the defense of the forest of Villers-Cotterêts should be conducted.[46] That same day Mangin submitted a plan of action for an exploratory attack to take some high ground west of Soissons.[47][48]

On 23 June, at a conference in Chaumont, Pershing reminded Foch of the discussion they had at Sarcus where he suggested a counterattack. Foch replied, “studies are being made,” but made no mention of when, where, or whether such an attack would be made.[49][48] Mangin's exploratory attack was executed on 28 June. According to Mangin, it “tended to prove” the Germans would have difficulty defending their positions against a surprise attack without artillery preparation. Additionally it would offer the best chance of success for an attack on the plateaus southwest of Soissons.[50][48]

Allied plan of attack at Soissons for the morning of 18 July 1918

On 12 July, Pétain issued instruction No. 14546 to the generals of the Group of Armies of the Reserve and the Group of Armies of the Center to make immediate preparations for an attack. He stated, "The minimum advantage gained should be to deprive the enemy of the use of the Soissons communication net."[51] That same day Pétain issued instructions for an offensive whose purpose was to reduce the Marne salient. This would entail utilizing the French Tenth and Sixth Armies against the western flank of the salient, and the Fifth Army on the eastern flank. The French Tenth Army would carry out the main attack against the Soissons communication network. In support of the main attack, the French Sixth Army would attack south of the Ourcq River while the French Fifth Army would attack the eastern flank of the salient along both banks of the Ardre River with its right flank on the heights south of the Vesle River. At the very least the action of the French Fifth and Sixth Armies would result in preventing enemy reserves from moving against the main attack.[52]

The following day Pétain stated the attack should be launched the morning of 18 July while stressing the necessity of secrecy.[53] On 14 July both the American 1st Division and the American 2nd Division were transferred to the French Tenth Army XX Corps under General Pierre Emile Berdoulat.[54]

On 15 July, General Max von Boehn, commander of the German Seventh Army, succeeded in getting seven divisions across the Marne.[48] In response Pétain sent a message to General Émile Fayolle, commander of the Group of Armies of the Reserve, ordering him to “suspend the Mangin operation in order to enable me to send your reserves into the battle south of the Marne.”[55] The message also ordered the return of the American 2nd Division artillery to the American 2nd Division. Within 2 1/2 hours Foch brusquely rescinded the suspension of the Mangin operation declaring “there can be no question at all of slowing up and less so of stopping the Mangin preparations.[56]

Terrain

Looking east from the Forêt de Retz, one would see an almost tree barren rolling plateau with waist-high wheat fields. Trench systems, which were the hallmark of World War I battlefields, were non-existent on this stretch of the front. The final objective, the road and rail network running south from Soissons in the Crise River valley, was about 7.5 mi (12 km) to the east and was hidden from view because of the sloping terrain.[57][58]

Cutting across the plateau were a series of four deep, swampy, formidable ravines; Missy, Ploisy, Chazelle-Lechelle, and Vierzy. Villages, consisting of buildings constructed of sturdy stone masonry, were within and near the edges of these ravines. Substantially sized caves in the area had been carved out to quarry the stone for the villages.[59]

There were two main roads which stood between the final objective and the jump off point. The Soissons – Château-Thierry road ran due south, almost perpendicular, to the line of attack. The Soissons – Paris road ran southwest far from the American 1st Division jump-off point but crossing the American 2nd Division right at the jump-off point. These roadways were the principal lines of communication for the German troops in the Marne salient.[60]

The railroad ran south from Soissons in the Crise River valley paralleling the Soissons – Château-Thierry road. At Noyant-et-Aconin it split with one branch turning southwest to Paris in the 2nd Division zone of attack.[61] A second branch continued south through Oulchy-le-Château to Château-Thierry and also served as a principal line of communication.[62]

The first major obstacle for the 1st Division was Missy Ravine, directly in the path of 2nd Brigade. This would allow 1st Brigade to make quicker progress until it had to contend with Chazelle Ravine 2.5 mi (4.0 km) further east. The 2nd Brigade would then have to deal with Ploisy Ravine 1.7 mi (2.7 km) beyond Missy Ravine. The 2nd Division would have to struggle with two arms of Vierzy Ravine, one of which cut completely across their sector. This meant that both the 1st and 2nd Divisions would have to contend with at least one ravine before the Moroccan 1st Division encountered the Chazelle-Léchelle Ravine.[63]

Preparation

Foch's desire was to achieve surprise of time and place.[48] In order to achieve this, unusual precautions were taken limiting all information regarding the attack to the high command.[64] On 14 July Fayolle issued a memorandum ordering the entire Group of Armies of the Reserve not to trust anyone not personally known to be reliable, move only at night, light no fires, and to report anything and anyone suspicious. In order to confuse the Germans as to his intentions Mangin chose to keep his artillery far back from the German forward areas in what the Germans considered a defensive posture - within range of the German front lines but unable to slow the arrival of enemy replacements or reinforcements.[65] In order to keep the Germans off guard Mangin planned to have the two American divisions rush forward to the front just before the hour of attack.[66]

The 1st and 2nd Divisions were in need of replacements after their engagements at Cantigny and Château-Thierry – Belleau Wood, respectively. Both divisions were brought to full strength with men from the 41st Division in early July. On 12 July, less than six days before the start of the attack, both the 1st and 2nd Divisions were assigned to the newly formed American III Corps which was attached to the French Sixth Army in the same order.[67] Fayolle's Chief of Staff, General Gabriel Alexandre Paquette, sent a telegram two days later attaching both divisions to Mangin's Tenth Army.[68]

At 11 am on 16 July, Fayolle sent a telegram to the French General Headquarters stating that Mangin recommended there be no preparatory barrage prior to the attack of the French Tenth Army so as to achieve complete surprise. The telegram further recommended the attack begin at 4:35 am behind a rolling barrage. The French Sixth Army, just to the south, would require a preparation barrage lasting one half hour. Fayolle left the start time of the barrage to General Jean Marie Degoutte, commander of the French Sixth Army, with the caveat the barrage not precede the French Tenth Army jump-off. At noon on 17 July, 1918, Pétain approved Fayolle's recommendations and set 18 July 1918 as the attack date.[69]

1st Division

Troops of the 16th Infantry rest near Berzy le Sec, France, 17 Jul 1918 the day before the attack at Soissons.

The American 1st Division was bivouacked in the Forêt de Compiegne on 16 July and spent the entire day under cover of the woods to avoid detection by German aircraft. On 17 July, the division moved to the area near Mortefontaine, approximately 8 mi (12.9 km) from their jump-off point. At 9:00 pm the division began to move eastward through the forest along trails cratered with shell holes. Soon after, a thunderstorm began turning the trails into a quagmire. Compelled to march off the trail and aided only by flashes of lightning, the infantry moved forward hanging onto the equipment of the man ahead to maintain the column.[70][64][71][72]

2nd Division

Paquette's order of transfer included orders for the 2nd Field Artillery Brigade of the American 2nd Division to move to Betz during the night of 14/15 July.[55] Brigadier General Albert J. Bowley went ahead of the brigade to Chantilly to confer with General Mangin who confirmed the orders. He then had Bowley send the brigade to a point in the Forêt de Retz. At the same time the division trains and transports were ordered to concentrate under cover in the vicinity of Lizy-sur-Ourcq.[73]

In his memoirs Major General James G. Harbord, commander of the American 2nd Division, complained he “found the 2nd Division entering another disorganizing secret mission … scattering its units with no information to the Division of their actual destination … Thus when the new Division Commander arrived he found a command short of artillery and trains, and no one in authority there who had any idea as to the purpose of the movements or when, if ever, the Division might expect to be brought together again”.[74] On Tuesday night Harbord was informed by Berdoulat his division would be in the attack on Thursday at daybreak. With his division “scattered through the Aisne Department … our Division would arrive at Marcilly, where they would be met by an unknown with orders, but I knew nothing of where they were to go … had been completely removed from the knowledge and control of its responsible Commander, and deflected by truck and by marching through France to a destination uncommunicated to any authority responsible for its supply, its safety or its efficiency in an attack thirty hours away. General Berdoulat and his people were unable to say where it would be debussed or where orders could reach it which would move it to its place in time."[75]

While visiting with Berdoulat on 16 July, Berdoulat's Operations Officer offered to write the battle orders for the American 2nd Division. Again on 17 July, while in Vivières, General Albert Daugan, commander of the Moroccan 1st Division, offered Harbord battle orders prepared by his Chief of Staff, Colonel Henri Giraud. Harbord refused both sets of orders stating later, “If I had accepted either orders and disaster had occurred, what would have been my position?”[76]

During the evening of the 16/17 July, Harbord and his staff went to the headquarters of Major General Robert L. Bullard in Taillefontaine on the northern edge of the Forêt de Retz. Here Harbord and his Chief of Staff, Colonel Preston Brown, “spent the rest of the night studying maps and preparing our attack order” with no opportunity to reconnoiter the area.”[77] Because he had no information regarding their whereabouts, Harbord had no idea if the unit he assigned to lead the attack would arrive first or last. Also of concern was that each unit commander be assigned a definite location where he could be found if needed during the attack.[78]

Harbord and his staff set out after dawn to locate his division to distribute orders and prepare it for the coming attack. They were able to locate Bowley and his artillery brigade near the Carrefour de Nemours but were unable to locate any of Harbord's other commanders or units. Colonel Paul B. Malone, commander of the 23rd Infantry Regiment, was first to arrive with part of his command. After receiving his orders, Malone was ordered to send selected officers to locate the remainder of the division, inform them of their area of concentration and the location of Division HQ.[79]

Much of the American 2nd Division began to arrive west of the Forêt de Retz out in the open mid-morning on 17 July. Screened from enemy aircraft and balloons by dense cloud cover, they were debussed twelve to 15 mi (24 km) from their position for attack. Moving into the Forêt de Retz, the American 2nd Division found themselves experiencing the same conditions as the American 1st Division. They slogged their way forward through the Moroccan 1st Division, two French second-line divisions, a division of the 30th Corps, a Cavalry Corps, tanks, Corps and Army artillery, and all the special services supporting these troops.[80] Having gone without sleep for 48 hours, the men would fall asleep on their feet at every halt. After one such halt, an officer in search of the missing half of his column found a horse had stepped sideways in front of a tired marine. The marine had fallen asleep with his head pressed against the horse's flank and had broken the line.[81]

Harbord said of the experience, “All arriving units told … of the weary night ride and the arbitrary debussment at unknown points, and of the lack of information and of an inevitable dispersion as a consequence of no co-ordination of the several bus groups. They had no maps, no guides, and they were not told where to go.”[81] At the announced resupply point, which Harbord expropriated from the American 1st Division, there was not enough ammunition to go around. Most of the machine guns were lost in the rear area and did not rejoin the division until 19 July.[82][83] As a consequence the 5th Machine Gun Battalion received its guns the day of the battle and the 4th Machine Gun Battalion made its way into the forest without guns and ammunition. The 6th Machine Gun Battalion, although carrying guns and ammunition, did not arrive at the jump-off point in time to go over with the infantry.[82]

Malone had two of his battalions in place before the attack but was informed by one of his staff his third battalion was missing. In the rain and darkness he located the missing battalion, plus two Marine battalions who were also lost. Once the two Marine battalions were set on the right trails Malone double-timed his battalion toward the front the last 1 mi (1.6 km) and had to run the last 984 ft (300 m) to gain the rolling barrage.[84][81]

By contrast, the Moroccan 1st Division had been holding this section of the front and was familiar with the terrain. Their movement leading up to the attack consisted of pulling in their flanks to make room for the two American divisions.[85]

German Army

On 19 June 1918, prior to the start of the fifth offensive, the German Ninth Army was transferred from Romania on the Eastern Front to the Western Front.[86] On 23 June, the Ninth Army was assigned the sector to the left of the Eighteenth Army and the right of the Seventh Army which was, from the German perspective, the right shoulder of the Marne Salient.[87]

Disposition of German Forces for the attack on the Marne 15 July 1918.

Three corps, each consisting of three divisions, were assigned to the Ninth Army. VII Corps was assigned the right flank of the sector, XIII Corps was assigned the left flank, and the XXXIX Reserve Corps was assigned the sector in the center. In addition, four divisions were held in Army reserve while a fifth division was held in Army Group reserve in the Ninth Army sector. XIII Corps was south of the Aisne River. XXXIX Reserve Corps straddled the Aisne with the Bavarian 11th Division positioned on the south bank and the German 241st Division on the north bank.[88]

Despite Foch's efforts to keep his attack secret, German documents from 11 July indicated deserters informed them of a large buildup of troops in the Forêt de Retz and of an impending large-scale attack. The Germans expected the attack would be launched south of the Aisne River with the main thrust directed against the German XIII Corps.[89]

In an effort to strengthen their defenses south of the Aisne, the Germans placed artillery batteries in the German 241st Division sector assuring artillery enfilade fire to the south. The German 46th Reserve Division was brought up in support of the VII Corps. The German 14th Division was placed in support of the XXXIX Reserve Corps north of the Aisne and the German 34th Division was brought up in support of the XXXIX Reserve Corps south of the Aisne. The German 6th Division was brought up to shore up the sector boundary between the XXXIX Reserve Corps and XIII Corps. The German 47th Reserve and 28th Divisions were brought up to support the XIII Corps. The 28th Division was concentrated on the south bank of the Aisne. Finally, the artillery of the German 211th Division in VII Corps was transferred to the German 28th Division sector.[90]

On the evening of 11 July, General Johannes von Eben, commander of the German Ninth Army, sent orders to his corps commanders to establish lines of resistance with strong points at Pernant, Beaurepaire Farm, west of Villers-Hélon, and the hills of Chouy. A second line of resistance with strong points at Saconin-et-Breuil, Chaudun, Vierzy, and the west edge of the Bois de Mauloy near St. Rémy-Blanzy was also to be established.[91] Beginning on the evening 12 July, artillery of the Ninth Army began firing on points of assembly and routes of approach in order to interfere as much as possible with Allied preparations. It was also reported that Allied infantry columns were spotted moving east from Taillefontaine.[92]

Order of battle

The following is a list of the major units which were in place at the start of the battle 18 July 1918. In all cases divisions are listed north to south (left to right when looking at a map from the Allied perspective).

Allied order of battle

Allied Armies[93]:
- Marshal Ferdinand Foch, Commanding
- General Maxime Weygand, Chief of Staff
- Armies of the North and Northeast:
  - General Philipe Pétain, Commanding
  - General Edmond Buat, Chief of Staff
- American General Headquarters:
  - General John J. Pershing, Commanding
  - Major General James W. McAndrew, Chief of Staff
- Group of Armies of the Reserve:
  - General Émile Fayolle, Commanding
  - General Gabriel Alexandre Paquette, Chief of Staff
  - French Tenth Army:
    - General Charles E. Mangin, Commanding
    - Colonel Émile Hergault, Chief of Staff
    - French I Corps:
      - General Gustave Paul Lacapelle, Commanding
      - French 69th Division
      - French 153rd Division
    - French XX Corps:
      - General Pierre Émile Berdoulat, Commanding
      - American 1st Division
        Major General Charles Pelot Summerall, Commanding
        
        Colonel Campbell King, Chief of Staff
        
        1st Infantry Brigade
        16th Infantry Regiment
        
        18th Infantry Regiment
        
        2nd Machine Gun Battalion
        
        2nd Infantry Brigade
        26th Infantry Regiment
        
        28th Infantry Regiment
        
        3rd Machine Gun Battalion
        
        1st Field Artillery Brigade
        5th Field Artillery Regiment
        
        6th Field Artillery Regiment
        
        7th Field Artillery Regiment
        
        1st Trench Mortar Battery
        
        1st Machine Gun Battalion
      - Moroccan 1st Division
        General Albert Daugan, Commanding
        
        Colonel Henri Giraud, Chief of Staff
        
        1st Moroccan Brigade
        Marching Regiment of the Foreign Legion, R.M.L.E.
        
        Russian Legion Battalion
        
        12th Malagazy Tirailleurs Regiment
        
        2nd Moroccan Brigade
        7th Algerian Tirailleurs Regiment
        
        8th Zouave Regiment
      - American 2nd Division
        Major General James G. Harbord, Commanding
        
        Colonel Preston Brown, Chief of Staff
        
        3rd Infantry Brigade
        9th Infantry Regiment
        
        23rd Infantry Regiment
        
        5th Machine Gun Battalion
        
        4th Marine Brigade
        5th Marine Regiment
        
        6th Marine Regiment
        
        6th Machine Gun Battalion
        
        2nd Field Artillery Brigade
        12th Field Artillery Regiment
        
        15th Field Artillery Regiment
        
        17th Field Artillery Regiment
        
        2nd Trench Mortar Battery
        
        4th Machine Gun Battalion
    - American III Corps: (In reserve)[lower-alpha 3]
      - Major General Bullard, Commanding
      - Brigadier General Alfred William Bjornstad, Chief of Staff
    - French XXX Corps:
      - General Hippolyte-Alphonse Penet, Commanding
      - French 38th Division
      - French 48th Division
    - French XI Corps:
      - General Prax, Commanding
      - French 128th Division
      - French 41st Division

German order of battle

German Armies[87][94][95]:
- First Quartermaster-General Erich Friedrich Ludendorff, Commanding
- Army Group German Crown Prince
  - Crown Prince Friedrich Wilhelm Ernst, Commanding
  - Major General Count Schulenburg, Chief of Staff
  - German Ninth Army
    - General Johannes von Eben, Commanding
    - Lieutenant Colonel von Esebeck, Chief of Staff
    - VII Corps
      - General Wilhelm von Woyna, Commanding
      - German 223rd Division
      - German 211th Division
      - German 202nd Division
    - XXXIX Reserve Corps
      - General Hermann von Staabs, Commanding
      - German 53rd Reserve Division
      - German 241st Division
      - Bavarian 11th Division
    - XIII Corps
      - General Theodor von Watter, Commanding
      - German 42nd Division
      - German 14th Reserve Division
      - German 115th Division
    - Army Reserve
      - German 14th Division
      - German 34th Division
      - German 47th Reserve Division
      - German 23rd Division
  - German Seventh Army
    - Colonel General Max von Boehn, Commanding
    - XXV Reserve Corps
      - General Arnold von Winckler
      - German 40th Division
      - Bavarian 10th Division
      - German 78th Reserve Division
    - VIII Corps
      - General Roderich von Schoeler
      - German 4th Ersatz Division
      - German 87th Division
      - German 201st Division
    - XXIII Reserve Corps
      - General Hugo von Kathen
      - German 10th Landwehr Division
      - German 36th Division
    - VIII Reserve Corps
      - General Georg von Wichura
      - Bavarian 6th Reserve Division
      - 23rd Division
      - 200th Division
      - 1st Guard Division
    - IV Reserve Corps
      - General Richard von Conta
      - 37th Division
      - 113th Division
      - 10th Reserve Division
      - 2nd Guard Division
    - V Bavarian Corps
      - General Eberhard Graf von Schmettow
      - 195th Division
      - Bavarian 12th Division
      - 22nd Division
      - 103rd Division (only 2/3)
    - VI Reserve Corps
      - General Kurt von dem Borne
      - 123rd Division
      - 103rd Division (only 1/3)
      - 50th Division
      - 88th Division
    - Army Group Reserve
      - German 6th Division

The Battle

The American 1st Division was assigned to the northernmost attack zone in the French XX Corps sector with the French 153rd Division of the French I Corps to their north. The American 2nd Division was assigned to the southernmost attack zone with the French 38th Division to their south. Sandwiched between the two American divisions was the Moroccan 1st Division. Two French divisions were held in reserve. 40 squadrons of the French 1st Air Division were attached to the French Tenth Army to provide air support. However, the orders given to the aviators indicate they were there principally to provide reconnaissance.[96]

Attached to the American 1st Division were the French 253rd Field Artillery Regiment (truck-carried 75 mm field guns)[97], and the French 11th and 12th Tank Groups (light tanks).[98] The artillery of the French 58th Division and the French 288th Field Artillery Regiment[99] as well as the French 11th and 12th Tank Groups (heavy tanks) were attached to the American 2nd Division.[98] Attached to the Moroccan 1st Division were the French 4th Tank Group[98] and the French 29th Field Artillery Regiment (truck-carried 75 mm field guns).[97]

Day 1: Thursday, 18 July 1918

Just prior to the start of the assault, the Germans in the zone of attack of the American 1st Division, 2nd Brigade and that of the French 153rd Division to their north fired a weak counter barrage. Deserting or captured soldiers from the French 153rd had warned the 11th Bavarian Division of the impending attack between 4:00 am and 5:00 am.[100] The artillery fire, which was concentrated on the crossroads at Cutry, inflicted 25% casualties on the 3rd Battalion, 28th Infantry, 1st Division which was designated as the support battalion for the advance.[101]

At 4:35 am, Allied artillery fire was directed at the German Ninth Army in the sectors of the German 202nd Division on the southern flank of the German VII Corps, the entire front of the German XXXIX Reserve Corps and the German XIII Corps. The entire front of the German XXV Reserve Corps and the northern flank of the German VIII Corps in the German Seventh Army also came under artillery fire.[100]

American 1st Division

2nd Brigade

28th Infantry Regiment

The attack began with a rolling barrage, advancing at a rate of 328 ft (100 m) every two minutes, across the entire front with the infantry rushing forward to gain the barrage.[84][102][103] Both the 26th and 28th Infantry Regiments went into the attack without grenades and their ammunition carriers were out of contact to the rear. For the initial assault, 2nd Battalion served as the 28th Infantry's assault battalion with 3rd Battalion following in support and 1st Battalion held in division reserve.[104] Initially the attack was met with little resistance. However, 28th Infantry began taking heavy fire directed at its flanks as they approached Saint Amand Farm, a strong point in the French 153rd Division's zone to their north. A portion of 2nd Battalion veered northeast and the farm was taken by 7:00 am.[105]

Well north of the division boundary, 2nd Battalion was now directly in front of Missy Ravine, which the French 153rd Division was told by Mangin to avoid. On the western edge of the ravine was the village of le Mont d’Arly. At the bottom of the ravine and further north into the French 153rd Division sector was Saconin-et-Breuil. Directly across from le Mont d’Arly, on the eastern lip of the ravine, was the village of Breuil. A fourth village, Missy-aux-Bois, was on the southeastern lip of the ravine in the sector of 26th Infantry. The Germans had artillery, machine guns, and infantry emplacements throughout the ravine as well as artillery on the eastern bank. Across the bottom of the western edge of the ravine was a swamp with footbridges.[106][107]

When two companies of 2nd Battalion attempted to cross the ravine they were met with withering machine-gun fire from Saconin-et-Breuil and artillery fire from Breuil. A second attempt saw them advance another 300 yd (274 m) while taking heavy casualties.[108] Of the five French tanks that ventured down the slopes of the ravine, three were destroyed by artillery fire and two sank in the swamp.[109]

The commanders of the 2nd and 3rd Battalions decided they needed to combine forces to reach the eastern edge of the ravine. Wading elsewhere through the waist deep swamp, the combined force made it up the eastern bank of Missy Ravine and captured all the guns by 9:30 am. While still under heavy machine-gun fire, the men formed a consolidated line 300 yd (274 m) east of Breuil. Having lost all of its officers, 2nd Battalion was reorganized into five small platoons plus a machine gun platoon, each commanded by a sergeant.[108][110]

While the combined force was attacking east across the ravine, Company M of 3rd Battalion had been placed in reserve near le Mont d’Arly. Here they spotted a large group of Germans emerge from a cave intending to attack the 2nd and 3rd Battalions from the rear. Two platoons from M Company fired on the Germans and drove them back into the cave where they held out until 4:00 pm. Twenty officers and about 500 soldiers were captured along with trench mortars and machine guns. Later in the day, another large group of German medical personnel were discovered in the same cave. These were put to work in a common aid station treating wounded from both sides.[111]

By 11:00 am, Colonel Conrad Babcock, commander of 28th Infantry Regiment, was conferring with the French of the 153rd Division about moving 2nd Battalion back into its own sector. However, the French 153rd Division was failing to keep abreast in the attack. This was due in large part to the southward facing entrenchments in the division's zone of attack. These entrenchments followed favorable terrain with a series of strong points which dominated the plateau running southwest from the town of Vauxbuin. This defensive position allowed the Germans to fire into the open flank of the 28th Infantry which was attacking across their front. The Germans considered this position to be the key to defending Soissons. When the German XIII Corps was informed of the attack, it was the first to be reinforced; initially by one brigade and then three more brigades later in the day. The French 153rd Division eventually took Saconin-et-Breuil and sent a battalion to relieve the Americans. All of 2nd Battalion was back in their attack zone by 2:00 pm.[112][113]

26th Infantry Regiment

26th Infantry Regiment had taken their first objective by 5:30 am. and halted halfway to Missy-aux-Bois. The regiment continued eastward and took Missy-aux-Bois on the southern lip of Missy Ravine by 9:00 am. They advanced about 0.62 mi (1 km) east of Missy-aux-Bois before being pinned down just west of the Soissons – Paris road by machine gun fire from the eastern side of the road.[114]

1st Brigade

16th Infantry Regiment digging in north of Chaudun, 18 July 1918

1st Brigade advanced eastward to the intermediate objective, the line La Glaux Tillieul – La Glaux, behind a rolling barrage advancing at the rate of 328 ft (100 m) every two minutes. Because their advance wasn't slowed by ravines, the left flank of the 16th Infantry on the north of the brigade sector became exposed. Further to the south 18th Infantry was able to keep pace with 16th Infantry. The Moroccan 1st Division, on the right flank of 18th Infantry, kept pace to the first objective but slowed to 328 ft (100 m) every 4 minutes beyond that point. As 18th Infantry pushed forward their right flank became exposed and they started taking enfilading machine gun fire from Cravançon Farm. Colonel Frank Parker sent an element of 18th Infantry into the Moroccan 1st Division's zone to deal with the problem. Shortly thereafter, Cravançon Farm was in American hands. Both the 16th and 18th Infantry Regiments were far enough south of the machine guns at Vauxbuin to be out of range and by 8:30 am both regiments had crossed the Soissons – Paris road. Both regiments reformed and advanced through the Chaudun Position to take the wheat fields north of Chaudun.[115]

By 11:00 am, the American 1st Division captured both objectives Foch had hoped for by the end of the day. Berdoulat, wishing to exploit his early success, issued orders for the American 1st Division to reach the line Berzy-le-Sec – Buzancy facing northeast to block the southern outlets of the Crise River. The French 153rd Division was tasked with capturing Berzy-le-Sec and the Moroccan 1st Division was assigned the taking of Buzancy.[116] 1st Division spent the afternoon preparing to go on the attack again at 5:00 pm.[84] Artillery was moved forward, food and ammunition was distributed, and telephone lines were strung.[117] Unable to secure artillery support to suppress the heavy enfilading machine gun fire from the Vauxbin Position, 2nd Brigade was unable to advance beyond the 2nd objective. 1st Brigade was on the third objective just north of Buzancy.[117]

Having lost ground and most of their artillery that morning, the Germans rushed all available reserves to the area. Defensive positions bristling with machine guns were set up west of the Soissons – Château-Thierry road roughly along the line Soissons – Belleu – Noyant-et-Aconin – Hartennes-et-Taux. New artillery was placed on the hills overlooking the Soissons – Château-Thierry road 3 mi (4.8 km) from the front and fresh machine gun units were brought up.[118]

Moroccan 1st Division

The attack zone of the Moroccan 1st Division was on the right flank of the 18th Infantry, 1st Division and the left flank of the 5th Marines, 2nd Division. While it was one of only three French Divisions which still had twelve battalions, it had been fighting over the same ground since May and was well below strength. At the start of the attack, the division was supported by 48 Schneider tanks. The 1st RMLE (Foreign Legion Provisional Regiment) and an attached Senegalese battalion were to advance north of the Bois de l’Equippe. Two Senegalese battalions, in liaison with the 5th Marines, passed south along the Route Quesnoy through the Bois de Quesnoy. The Legionnaires came up a bit late but eventually made contact with 18th Infantry and fought their way across the Soissons – Paris road. Just east of the road was Cravançon Farm and beyond that was the town Chaudun. While both villages were within the northern boundary of the Moroccan 1st Division attack zone, it was the American 1st Division who took Cravançon Farm and the 5th Marines, for the most part, that took Chaudun.[119]

The events surrounding the taking of Chaudun are a piece of disputed history. It involves Marines from the south, 18th Infantry soldier's from the north, and the Senegalese. According to the 18th Infantry's historian, Chaudun was taken by the regiment and turned over to the French. But Marine Corps historians reject the 18th Infantry version claiming “the town was taken by Company A, 5th Marines, with some hangers-on, none of whom were from the 1st Division.” The statement published by the American Battle Monuments Commission says “the town, in the zone of the Moroccan division, was captured on July 18 in an attack in which the 2nd Division participated. The attack was launched from the south."[120][121]

About 10:00 am, the Moroccan 1st Division, aided by tanks, mounted an attack toward the Rapière at the southern edge of the Villemontoire Ravine. The German defenses collapsed and ran to the rear past Villemontoire. By noon the 2nd Battalion, 110th Grenadiers, 28th Division was isolated on the western lip of Chazelle Ravine and forced to withdraw to rally positions east of the Soissons–Paris road. The 3rd Battalion, 110th Grenadiers, 28th Division was called forward from their reserve position to defend the northern portion of the sector near Léchelle. The battalion was attacked by a mixed force assisted by armored vehicles. The attacking force tried to envelop the German position from the south in the direction of Charentigny. Short rounds from a German artillery barrage mistakenly fell on its own troops causing heavy casualties and forced the battalion to withdraw north of Buzancy.[122]

By midday, the Moroccan 1st Division had pushed forward on its own schedule but had been greatly assisted by both American divisions on its flanks. However, their attack stalled due to the Americans encroaching into their sector on both sides. By the end of the day the division withdrew slightly on its northern flank to connect with the 18th Infantry just north of Chaudun. On its southern flank they advanced southeastward to connect with the 5th Marines holding the southern edge of Léchelle Ravine.[123]

American 2nd Division

4th Marine Brigade

5th Marine Regiment

The assigned attack zone of the 5th Marine Regiment was the northern (left) flank of the 2nd Division. Because the 6th Marine Regiment was designated as general reserve for XX Corps by Berdoulat, the 5th Marines were assigned the attack frontage of an entire brigade.[124] This forced Lieutenant Colonel Logan Feland, commander of the 5th Marines, to use two assault battalions rather than the standard assault, support, reserve formation. The jump-off line for the regiment was well back in the Forêt de Retz and stretched southeast to liaise with 3rd Brigade whose jump-off line was in the fields east of the forest.[125]

Approaching the jump-off line in standard formation, 1st Battalion double-timed the final stretch not long after the barrage started. The following 2nd Battalion deployed to its right and the understrength 3rd Battalion followed in support.[125] The attack plan called for 5th Marines to wheel right in a southeasterly direction as they approached Maison Neuve after emerging from the forest.[126] Approximately half of the Marines in the frontline assault failed to make the change of direction. Three of 2nd Battalion's companies wheeled too far to the south and crossed the 9th Infantry sector. It joined elements of 23rd Infantry clearing Vauxcastille which was just over the division's southern boundary in the attack zone of the French 38th Division. A group of Americans from the 5th Marines and 23rd Infantry, apparently lost, were captured around noon between Missy-aux-Bois and Soissons near the Soissons – Paris road. This group crossed the entire front of French XX Corps and a German Corps.[127]

49th Company, 1st Battalion lost contact with the Moroccan 1st Division's liaison not long after breaking onto the fields of the plateau. Most of the Senegalese turned north to flank the Bois du Quesnoy while 49th Company started taking fire from Maison Neuve and Chaudun. Maison Neuve was just over the northern boundary of the 5th Marine's attack zone while Chaudun was near the northern boundary of the Moroccan 1st Division's attack zone. 17th Company of 1st Battalion, part of 2nd Battalion's 55th Company (detailed with maintaining liaison between battalions), and about 20 Senegalese fighters moved with 49th Company on Chaudun. After heavy fighting, Chaudun fell to the Marines and the Senegalese fighters around 9:00 am while other Marine elements cleared Maison Neuve.[121][127]

Once Chaudun was taken, the Marine battalions reassembled and worked their way back into their sector. They halted at the northern end of Vierzy Ravine which was their second objective. The ravine ran completely across the entire front of the 2nd Division from Maison Neuve at the northern end to Vauxcastille at the southern end. At the bottom of the ravine near Vauxcastille, the ravine ran due east to the town of Vierzy. Beyond Vierzy was the line which represented the XX Corps objective.[128]

3rd Brigade

9th Infantry Regiment

On the night of 17 July, Colonel LaRoy Upton, commander of the 9th Infantry Regiment, managed to get all but two of his companies through the Forêt de Retz and into position before midnight. Companies L and M were not in position until 4:15 am and 3:00 am, respectively. 1st Battalion led the 9th Infantry attack with 2nd Battalion following in support and 3rd Battalion in reserve. Because the Marines on their left were a few minutes late and the supporting tanks hadn't arrived on time, 9th Infantry began taking flanking machine-gun fire from their left almost immediately. 1st Battalion turned left to face the fire and fought their way north toward Verte-Feuille Farm. At about 5:45 am the supporting tanks caught up to the front line and circled around the farm. At about the same time elements of the 5th Marines charged out of the woods to capture Verte-Feuille Farm. 1st Battalion continued northeast, cutting across the 5th Marines attack zone into the Moroccan 1st Division's sector to fight at Maison Neuve.[129][130]

La Verte-Feuille Farm after its capture by the 2nd Infantry Division (United States) on the morning of 18 July 1918.

Although 3rd Battalion was supposed to be in regimental reserve, Lieutenant Ladislav Janda, commander of Company M, noticed his company was advancing with the first wave as 1st and 2nd Battalion veered off to the left while other troops were approaching from the right. While Janda kept his company on course, he received word the troops on his right were from 23rd Infantry. By 5:15 am, Company M had seized control of Beaurepaire Farm on the southern boundary of 9th Infantry's attack zone, just as the rolling barrage passed the farm. While rounding up the surviving Germans a stray platoon from Company I arrived. In taking the farm, Company M lost about forty percent of its strength.[129][131]

Soon after leaving Beaurepaire Farm, Company M began taking artillery and machine-gun fire from across Vierzy Ravine. The company had halted at the edge of the ravine when they were hit with tear gas. Plunging down the slope, what remained of Company M crossed the ravine and scrambled up the opposite slope where the gun emplacements were located. The German gun crews had retreated through the wheat field beyond the ravine. Pausing for a short while to recover, Company M continued its advance to a point about 500 yd (457 m) north-northeast of Vierzy; reaching there by 9:20 am.[129][131]

23rd Infantry Regiment

The 23rd Infantry Regiment had the southernmost attack zone in XX Corps with the French 38th Division on its right flank. 2nd Battalion was the attack battalion for 23rd Infantry with 1st Battalion in support and 3rd Battalion in reserve. To ensure his battalion made the attack on time, Major d’Arly Fechet had his men double-time the last few hundred yards/meters to the jump off line.[132]

Early in the attack, 23rd Infantry made the turn to the southeast and proceeded in good order until they reached Vauxcastille where they met stiff resistance. With their right flank exposed, elements of both the 1st and 2nd Battalions moved into the French 38th Division attack zone while elements of 3rd Battalion were sent forward piecemeal. 23rd Infantry surrounded Vauxcastille and, after heavy fighting, the Germans were driven from the town. A large number of the Germans who fled Vauxcastille hid in the nearby caves but were captured later in the afternoon.[133][134]

Afternoon

By mid-morning both the 9th Infantry and 23rd Infantry commanders moved their command posts forward to Beaurepaire Farm. They were joined by Brigadier General Hanson Ely, commander of 3rd Brigade, and his staff just past noon. Around mid-afternoon, Harbord advised Ely of the attack order for the following day. However, the start positions for the attack had not yet been captured. Ely set about getting his regimental commanders and the 5th Marines prepared to make a late afternoon attack. The plan called for the attack to start at 6:00 pm but the French tank commander said he could not be ready before 7:00 pm. Ely then ordered the infantry to attack when ready but not later than 6:00 pm, with the tanks to join the attack as soon as possible. The attack eventually commenced at 7:00 pm.[135]

9th Infantry, reinforced with the 5th Marines, attacked in the northern sector of Vierzy Ravine and moved east. The plan called for two attacking battalions with two battalions in support on a front over a 1,000 yd (900 m) wide. From the outset the attack met with resistance on the right front. After advancing about 1 mi (1.6 km), the attack ran into heavy enfilading machine-gun fire from Léchelle Woods and Ravine on the left flank.[136]

On the left flank of the advance, 2nd Battalion, 5th Marines turned northeast toward the fire following the support tanks. When the Germans fired an intense artillery barrage, the tanks reversed course and retreated through the Marines’ front line with the artillery barrage following in their wake. When the barrage passed, the Marines cleared out the defensive positions and continued east. These same defensive positions had been holding up the Moroccan attack. The German southern flank was now completely exposed.[136]

In the southern portion of the division sector, some elements of 23rd Infantry and attached Marines approached Vierzy in the morning, causing most of the German defenders to flee. But because the fight for Vauxcastille lasted until almost 6:00 pm, 23rd Infantry was not able to move forward in force. The Germans finally gave up Vauxcastille when the town was surrounded by 1st and 2nd Battalion and French tanks east of the town.[137]

While the fight for Vauxcastille was playing out all afternoon, the Germans reoccupied Vierzy and fiercely defended the town. 23rd Infantry with 2nd Battalion on the left and 1st Battalion on the right (each with parts of 3rd Battalion and some men from 9th Infantry intermingled) attacked around 6:30 pm. At about 7:15 pm, a battalion of Moroccan troops and 15 tanks supported the attack in conjunction with heavy machine gun and artillery fire. Adding to the confusion was the French 38th Division of XXX Corps. Operating in the sector south of 2nd Division, they were attacking to the north and east on a line Montrembœuf Ferme – Bois de Mauloy toward Parcy-et-Tigny, well beyond the Americans. Because the French 38th Division threatened to envelop Vierzy the Germans were forced to vacate the town. Both brigades of the 2nd Division were ordered to move their command posts to Vierzy. After Vierzy fell, 1st Battalion pushed east to a point 1.86 mi (3 km) beyond the town.[138]