AD 737

Year 737 (DCCXXXVII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 737 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming.

• Battle of Avignon: Frankish forces under Charles Martel, Merovingian mayor of the palace, retake Avignon from the Muslims and destroy the Umayyad stronghold. He sends his brother Childebrand I, duke of Burgundy, to besiege the city. After his arrival, Charles leads the Frankish troops by using rope ladders and battering rams to attack the fortified walls which are burn to the ground following its capture.^[1][2]
• Battle of Narbonne: Frankish forces under Charles Martel besiege Narbonne, occupied by a Umayyad garrison, but is 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.^[3]
• Battle of the River Berre: Frankish forces under Charles Martel intercept a large Muslim army sent from Al-Andalus (modern Spain) led by Uqba ibn al-Hajjaj to relieve the siege of Narbonne. The Franks destroy them at the mouth of the River Bierre (northwest of Marseille), and drive the survivors into the nearby sea-lagoons, taking many prisoners.^[4] Charles effectively prevents Umayyad expansion in Gaul.
• 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.
• King Pelagius of Asturias dies and is succeeded by his son Favila.^[5] He founds the Church of Santa Cruz, in his capital Cangas de Onís (northwest of Spain).
• Orso Ipato is murdered at the instigation of Eutychius, exarch of Ravenna. He is succeeded by Domenico Leoni who is elected as the fourth doge of Venice.
• King Ongendus of the Danes reinforces the Danevirke fortifications in Schleswig-Holstein. He orders to build a palisade rampart on the frontier of Saxony.

• King Ceolwulf of Northumbria abdicates in favour of his cousin, Eadberht, and becomes a monk at Lindisfarne Priory.

• Egypt: Christians invade from the south with the aim of protecting the patriarch of Alexandria (approximate date).

• Arab–Khazar War: The Khazars led by Hazer Tarkhan defeat the Muslims near the Volga River and forced them to retreat. By holding the Caucasus against Islamic aggression, the Khazars delay their conquest of Eastern Europe and thwart the Umayyad desire to attack Constantinople from the north.
• September 30 – Battle of the Baggage: The Turgesh drive back an Umayyad invasion of Khuttal, pursue them south of the River Oxus (Northern Afghanistan), and capture their baggage train. In the winter, the Turgesh and their Transoxianan allies launch an major counter-invasion, but are halted.
• 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).

• For two years Japan has been suffering from a smallpox epidemic. Perhaps as much as one-third of the population has perished.

• Fujiwara no Tanetsugu, Japanese nobleman (d. 785)
• Huaisu, Chinese Buddhist monk (d. 799)
• Kanmu, emperor of Japan (d. 806)

• Ermin of Lobbes, Frankish abbot
• Forthhere, Anglo-Saxon bishop (approximate date)
• Fujiwara no Fusasaki, Japanese counselor (b. 681)
• Fujiwara no Maro, Japanese politician (b. 695)
• Fujiwara no Muchimaro, Japanese minister (b. 680)
• Fujiwara no Umakai, Japanese statesman (b. 694)
• Mu, king of Balhae (Korea)
• Mu'awiya ibn Hisham, Arab general
• Orso Ipato, doge of Venice
• Pelagius, king of Asturias (Spain)
• Song Jing, chancellor of the Tang Dynasty (b. 663)
• Theuderic IV, king of the Franks

• 737 is one of the abbreviations of the Boeing 737.

• Dragon Ball: Bardock perishes on his homeworld, Vegeta by Frieza's attack. His son, Kakarot escapes the planet's destruction and is raised on the planet Earth.