Northumbrians and East Angles swear allegiance to Alfred the Great. And promptly break their truce by attacking the south-west of England.
Graeco-Hungarian alliance forces Bulgar invaders to agree peace settlement. The Greeks then broke the peace settlement with Hungarians and realign with the Bulgars to attack Hungary; this substantially weakened both Hungary and the Bulgars to Greek benefit.
Japan ceases commercial relations (called Imperial embassies to China) with China on the orders of the Japanese emperor.