Liu Wenxi, Assistant Governor of the Four Garrisons and Beiting, rebelled at Jingzhou and was executed. (New Book of Tang (Xin Tangshu), Annals 新唐書 卷007 德宗·順宗·憲宗 建中1年4月)
On Yang Yan's proposal, the two-tax system takes effect from the new year (780), abolishing the zu-yong-diao levies and miscellaneous charges. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷226)
Zhu Ci and others besiege Jingzhou but cannot break through for a long time; then Liu Haibin and others kill Liu Wenxi. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷226)
Korean Peninsula (1)
Ichan Kim Jijeong rebelled and invaded the palace; Kim Yangsang and Kyeongsin raised troops and killed him. The king and his consorts were harmed by the rebel soldiers. (Samguk Sagi (History of the Three Kingdoms) 卷09 惠恭王 16年)
Fujiwara no Tsuguna is made great envoy for the conquest of the East (Seitō Taishi), with Ōtomo no Masutate and Ki no Kosami as vice-envoys. (Shoku Nihongi (Continued Chronicles of Japan) 續日本紀 卷第36 「癸巳。以中納言從三位」)
Southern Europe (1)
Resolved on a pilgrimage to Rome, Charles goes to Italy with his wife and children and spends Christmas at Ticinum (Royal Frankish Annals ARF(Einhard판) a.780, Kurze 1895 p.57)
Western Europe (1)
Charles enters Saxony with a great army, passes Eresburg and spends several days at the source of the Lippe; from there, at Obacrugo and at Ohrum, he has many eastern Saxons baptized. He camps where the Elbe and the Ora meet, settling affairs between the Saxons on this side of the Elbe and the Slavs on the far side (Royal Frankish Annals ARF(Einhard판) a.780, Kurze 1895 p.57)