The world in 646 AD — what happened that year

6 events the sources record for this year, grouped by region.

What happened

Several Tiele tribes sent envoys to Lingzhou asking that Taizong be honored as Khagan. (Old Book of Tang (Jiu Tangshu), Annals 舊唐書卷3 貞觀20年 9月)
Several Tiele tribes at Lingzhou asked Emperor Taizong for the title of Khan. (New Book of Tang (Xin Tangshu), Annals 新唐書卷002 太宗貞觀20年9月)
In the eighth month of the second year, by edict, he declares that among all things humans are the most spiritual, with heaven and earth and yin and yang, and makes clear his purpose to set government right (Nihon Shoki (Chronicles of Japan) 日本書紀卷第廿五孝徳紀 2年 단락53)
In August 646, Li Daozong, Prince of Jiangxia, crosses the desert and meets the resistance of tens of thousands of Xueyantuo under Apadaguan; he routs them, beheads more than 1,000 and pursues over 200 li. (Zizhi Tongjian (Comprehensive Mirror) 권198 646년 항)

In the second month of the second year of Taika, the emperor goes to the east gate of the palace and has the right minister Soga read the edict aloud (Nihon Shoki (Chronicles of Japan) 日本書紀卷第廿五孝徳紀 2年 단락43)

Expansion of the sanctuary in Mecca (Al-Tabari, History of the Prophets and Kings Series I tom.5 sect.1 (Arg.) [india.history.resource.86986], Annus 26)