720s

Millennium:	1st millennium
Centuries:	7th century; 8th century; 9th century;
Decades:	700s; 710s; 720s; 730s; 740s;
Years:	720; 721; 722; 723; 724; 725; 726; 727; 728; 729;
Categories:	Births; Deaths; Establishments; Disestablishments;

The 720s decade ran from January 1, 720, to December 31, 729.

Events

720

By place

Byzantine Empire

Summer – Emperor Leo III secures the Byzantine frontier, by inviting Slavic settlers into the depopulated districts of the Thracesian Theme (western Asia Minor). He undertakes a set of civil reforms, and reorganizes the theme structure in the Aegean region. Leo's 2-year-old son Constantine V is associated on the throne, and married to Tzitzak, daughter of the Khazar ruler (khagan) Bihar.

Europe

Umayyad conquest of Gaul: Governor Al-Samh continues his campaign; he makes Narbonne the capital city of Muslim Septimania (Southern France), and uses it as a base for razzias. King Ardo is killed, and becomes the last ruler of the Visigothic kings of Hispania. Some Visigoths refuse to adopt the Muslim faith, and flee north to Aquitaine. This marks the end of the Visigothic Kingdom.
Muslim forces under Al-Samh begin the prolonged siege of Carcassonne, a fortified Visigothic town located in the Languedoc-Roussillon.[1]

Britain

King Ine of Wessex builds a stone church at Glastonbury Abbey in Somerset (approximate date).

Arabian Empire

Umayyad conquest of Transoxiana: The first Turgesh attack on Muslim-Arabs in Transoxiana leads to the siege and relief of the Umayyad garrison at the fortress of Qasr al-Bahili, near Samarkand (or 721).
Yazid ibn al-Muhallab, former governor of Iraq, revolts and is defeated at Basra, by Umayyad forces under Al-Abbas ibn al-Walid and Maslama ibn Abd al-Malik. He is arrested and later executed.
February 10 – Caliph Umar II is poisoned by a servant, and dies in Aleppo (Syria) after a 3-year reign. He is succeeded by his cousin Yazid II.
The Umayyad Caliphate reaches its greatest extent in Spain, controlling all of it except a small region in the north controlled by the Kingdom of Asturias.

Asia

In the Chinese capital of Chang'an, the walls of a gated city ward collapse during the night, which unexpectedly forms a large pool out in the open. This is most likely caused by a sinkhole created when ground water eroded the limestone bedrock beneath. As a consequence of this, more than 500 homes are destroyed (approximate date).

Americas

The Third Tikal-Calakmul War begins.

By topic

Literature

The Nihon Shoki (日本書紀), one of the oldest history books in Japan, is completed under the editorial supervision of Prince Toneri, and with the assistance of Ō no Yasumaro.[2]

Religion

Contact between the Welsh Church and Yvi of Brittany is the last known link between two Celtic countries. After this, each nation goes its own separate way (approximate date).

Astronomy

A second series of gravitational interactions with Saturn, the second since 1664 BC, once again force the Centaur_(minor_planet) Chiron into a new orbit, shifting it from orbiting in the edges of the Solar System to orbiting near the inner regions.

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Significant people

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References

David Nicolle (2008). Poitiers AD 732, Charles Martel turns the Islamic tide (p. 17). ISBN 978-184603-230-1
Aston, William George (July 2005) [1972], "Introduction", Nihongi: Chronicles of Japan from the Earliest Times to AD 697 (Tra ed.), Tuttle Publishing, p. xv, ISBN 978-0-8048-3674-6, from the original Chinese and Japanese

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[1] David Nicolle (2008). Poitiers AD 732, Charles Martel turns the Islamic tide (p. 17). ISBN 978-184603-230-1

[2] Aston, William George (July 2005) [1972], "Introduction", Nihongi: Chronicles of Japan from the Earliest Times to AD 697 (Tra ed.), Tuttle Publishing, p. xv, ISBN 978-0-8048-3674-6, from the original Chinese and Japanese

Millennium:	1st millennium
Centuries:	7th century 8th century 9th century
Decades:	700s 710s 720s 730s 740s
Years:	720 721 722 723 724 725 726 727 728 729
Categories:	Births Deaths Establishments Disestablishments