6 events the sources record for this year, grouped by region.
What happened
China (4)
Emperor Wuzong died at the age of 33, and Prince Guang, the imperial uncle, ascended the throne as Xuanzong. (Old Book of Tang (Jiu Tangshu), Annals 舊唐書 卷18上 會昌6年 3月)
Emperor Wuzong died at the Daming Palace; the eunuch Ma Yuanzhi enthroned the Prince of Guang (Xuanzong). (New Book of Tang (Xin Tangshu), Annals 新唐書 卷008 穆宗~宣宗 會昌6年3月)
Gungbok of Cheonghae, resenting that his daughter was not accepted as a bride, rebelled and used his garrison as a base. (Samguk Sagi (History of the Three Kingdoms) 卷11 文聖王 8年)
In the fourth month, following the Dazaifu's petition, one shusei (district official) was placed in Kuwabara District of Ōsumi Province. (Shoku Nihon Kōki 續日本後紀 卷第十六 (원문 25번째 단락))
In the twelfth month, Saidaiji burned down; the Buddhist images in the lecture hall were all reduced to ash at once. (Shoku Nihon Kōki 續日本後紀 卷第十六 (원문 52번째 단락))