918 disestablishments

Mercia () was an early medieval English kingdom, one of the seven kingdoms of the Anglo-Saxon period. It was centred on the River Trent and its tributaries, in a region now known as the Midlands of England.

Anglo-Saxon kingdom in southeast Britain

'''T'aebong''' () was a state established by Kung Ye on the Korean Peninsula in 901 during the Later Three Kingdoms period.