5 events the sources record for this year, grouped by region.
What happened
China (1)
Mi-no-Nagahirotake and others returned from Bohai and conveyed the Bohai king's letter (kei), thanking him for the safe return of Ding Lin and others and asking for neighborly relations (kōrin). (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷5)
Japan (2)
The state of Bohai sent envoys with local products as tribute; the king presented a letter (kei) announcing the death of his predecessor. (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷4)
Nine thousand people from eight provinces, including Sagami and Musashi, were moved to Isaji Castle in Mutsu Province and held there. (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷5)
Southern Europe (1)
Hadrian dies and Leo ascends to the papacy; as envoy he sends the king the keys of St Peter and the banner of the city of Rome, and asks for noble envoys who will receive the oath of loyalty from the Romans. Angilbert is sent, and Duke Erich of Friuli sends to St Peter some of the treasures taken from the Hun palace at Ring (Royal Frankish Annals ARF(Einhard판) a.796, Kurze 1895 p.99)
Western Europe (1)
Pippin leads Italian and Bavarian troops in Pannonia, drives the Huns beyond the Tisza River, utterly destroys the Hun royal palace they called Ring, and carries off most of its wealth to his father at Aachen (Royal Frankish Annals ARF(Einhard판) a.796, Kurze 1895 p.99)