8 events the sources record for this year, grouped by region.
What happened
China (1)
Ōtomo no Minemari, Assistant Vice-Minister of War, was sent to Silla. Of the four ships of the Tang embassy that set out in early seventh month, two were turned back by the wind and two are missing, so he was to search whether they had drifted ashore in Silla. (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷12)
Japan (3)
From Musashi, Kazusa, Shimōsa, Hitachi, Kōzuke, Shimotsuke and Mutsu, 14,315 koku of dried rice (hoshi-ii) and 9,685 koku of rice were transported to the Nakayama palisade in Osada district of Mutsu, for the campaign against the Emishi. (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷12)
Sakanoue no Tamuramaro was again appointed Seii Taishōgun, with Kudara no Kyōun (百済王教雲), Saeki no Yashiro (佐伯社屋) and Michishima no Mitate (道嶋御楯) as deputies; eight military inspectors and twenty-four military clerks. (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷12)
Heavy rain and great wind: the west tower of the Nakain (中院) fell, and the left and right towers of the Shinsen-en were destroyed. The emperor lamented, asking whether this was unfavorable to him. (Nihon Kōki (Later Chronicles of Japan) 日本後紀 卷12)
Harun goes to Rayy and investigates Ali ibn Isa, governor of Khurasan (Al-Tabari, History of the Prophets and Kings Series III tom.2 (Arg.) [india.history.resource.86977], Annus 189)
The emperor moves the Saxons who lived across the Elbe at Bichamodi, with their wives and children, into Frankish land, and gives that land to the Abodrites. Danish King Godofrid comes with fleet and cavalry to Sliesthorp but, afraid to meet him, sends his message only through envoys (Royal Frankish Annals ARF a.804, Kurze 1895 p.118)