Leo III of the Byzantine Empire orders the destruction of all icons, beginning the First Iconoclastic Period. Many monks flee to Greece and Italy (taking smaller icons with them, hidden in their clothing); others flee to the caves of the Cappadocian desert.
Charles Martel leads two raids across the Loire River into the Berry region. The Franks seize and plunder Bourges (central France), but the city is immediately recaptured by Eudes of Aquitaine.
November 1 – Synod of Rome: Gregory III summons a council at the shrine of Saint Peter. All western bishops participate, including the Roman nobility. Gregory condemns Iconoclasm as a heresy.[10]
September – Charles Martel leads his Frankish army (30,000 men) to Orléans and crosses the Loire River, probably accompanied by Eudes of Aquitaine, with his remaining troops. He makes camp near Tours, probably at Ballan-Miré south-west of the fortress city, in order to protect the abbey of Saint Martin. Charles defeats or forces back Umayyad scouts or an advance guard, between the rivers Indre and Creuse. Abdul Rahman Al Ghafiqi pulls back to establish a position at the Vienne River.[13]
October – The Frankish army crosses the Vienne River and establishes a camp at or around the partially abandoned Roman mansion or agricultural settlement, now known as 'Vieux-Poitiers' (near Châtellerault), perhaps using the Roman theatre with its substantial towers as a fortification. Charles Martel forms a defensive position across the Roman road, and fends off Muslim skirmishes during the 'seven days' stand-off, probably involving scouts, and perhaps raiders from both armies.[14]
October 10 – Battle of Tours: The Frankish and Burgundian forces under Charles Martel defeat a large army of Abdul Rahman Al Ghafiqi, near Poitiers, halting the Islamic advance into Western Europe; Rahman Al Ghafiqi is killed during the battle. Charles extends his authority in the south of France, which gives him the nickname Martellus ("The Hammer"). The outcome of the victory is a turning point, and establishes a balance of power between Western Europe and the Byzantine Empire.[15]
Muslim forces withdraw southwards to Septimania; a separate part probably pulls back along the road it originally came through, across the Pyrenees Mountains. Eudes of Aquitaine pursues the main Muslim army via La Marche, before returning to Bordeaux; Charles Martel withdraws to Frankish territory through Orléans and Auxerre, demoting those bishops whom he thought unreliable. Abd al-Malik ibn Katan al-Fihri becomes the new governor (wali) of Al-Andalus; a separate Muslim force raids the Rhône region.[12]
Ecgbert is appointed bishop of York, by his cousin Ceolwulf of Northumbria.[17] He founds a library, and makes the city a renowned centre of learning (approximate date).
Battle of the Boarn: The Franks under Charles Martel, mayor of the palace of Neustria and Austrasia, defeat the Frisians near the mouth of the River Boarn (now the Dutch province of Friesland). During the battle, the Frisian army is beaten and King Poppo is killed.[21] The Franks gain control of the Frisian lands west of the Lauwers (Netherlands), and begin plundering the pagan sanctuaries. The Frisians become Frankish vassals, apart from the tribes living in East Frisia in present-day Germany.
March 23 – A large earthquake strikes the Tang dynasty city of Qinzhou (in the vicinity of modern-day Tianshui City), causing serious damage and killing around 4000 people.[23]
King Liutprand of the Lombards raises his nephew Hildeprand to co-kingship, after a serious illness (approximate date).
Siege of al-Sakhra: Moors under Uqba ibn al-Hajjaj (governor of Al-Andalus) besiege Pelagius, king of Asturias, in the uppermost Northern mountain ranges in Iberia. The battle ends inconclusively, with Pelagius surviving, but 270 out of his 300 followers are killed (at least according to a Muslim chronicle from the 11th century).
King Óengus I of the Picts invades the neighbouring kingdom of Dál Riata, which is subjugated. He takes the fortress of Dunadd,[34] and establishes his rule in Scotland for over two decades.
Battle of Narbonne: Frankish forces under Charles Martel besiege Narbonne, occupied by a Umayyad garrison, but are unable to retake the fortress city. A Lombard army under King Liutprand crosses the Alps, to aid Charles in expelling the Muslims from Septimania. Meanwhile Maurontus, duke or count of Provence, raises a revolt from his unconquered city of Marseille, and threatens the rear of the Franks.[37]
Battle of the River Berre: Frankish forces sent by Charles Martel intercept a large Muslim army sent from Al-Andalus, (modern Spain) sent by Uqba ibn al-Hajjaj to relieve the siege of Narbonne. Both sides suffer heavy losses at the battlefield near the mouth of the River Berre (a short distance south of Narbonne). Some of the Muslims rush back to their ships, and some penetrate through the Frankish forces and make it to the city, effectively saving it from the Franks.[38]
Following the death of Theuderic IV, king of the Franks, the throne is left vacant for seven years. Charles Martel has his son Childeric III exiled to a monastery, and becomes sole ruler of the Frankish Kingdom.
Emperor Xuan Zong discards the policy of conscripting men into the Chinese army to be replaced every three years, replacing them with long-service soldiers who are more battle-hardened and efficient (approximate date).
A major Japanese smallpox epidemic that started in 735 finally runs its course, but only after causing an estimated 25% to 35% mortality among the adult population in the country.[40]
King Favila of Asturias dies after a 2-year reign (probably killed by a bear). He is succeeded by his brother-in-law Alfonso I, husband of his sister Ermesinda.
Duke Pemmo of Friuli is deposed by Liutprand, and succeeded by his son Ratchis. He flees with his followers, but Ratchis secures his father's pardon.
^Golden, Peter B. (2010). Turks and Khazars: origins, institutions, and interactions in pre-Mongol Eurasia. Farnham, England: Ashgate/Variorum. ISBN978-1-4094-0003-5.
^Mayr-Harting, "Ecgberht (d. 766)". Oxford Dictionary of National Biography.
^David Nicolle (2008). Poitiers AD 732, Charles Martel turns the Islamic tide (p. 19). ISBN978-184603-230-1
^Riche, Pierre (1993). The Carolingians: A Family Who Forged Europe. University of Pennsylvania Press, p. 45. ISBN0-8122-1342-4
^Lynch, Michael, ed. (February 24, 2011). The Oxford companion to Scottish history. Oxford University Press. p. 180. ISBN9780199693054.
^Halsall, Guy (2003). Warfare and Society in the Barbarian West 450-900. London: Routledge, p. 226. ISBN0-415-23939-7.
^Mastnak, Tomaz (2002). Crusading Peace: Christendom, the Muslim World, and Western Political Order. University of California Press, p. 101. ISBN0-520-22635-6.