the Anglo-Saxon kingdom in the Midlands (England)

Mercia was an Anglo-Saxon kingdom. It's borders probably changed, but in the 7th century included the Midlands, the land to the Welsh border on the west, and to the North Sea on the East.

Mercia (, "border people") was one of the kingdoms of the Anglo-Saxon heptarchy, centred on the valley of the River Trent and its tributaries in what is now the Midlands of England. Mercia's neighbours included Northumbria, Powys, the kingdoms of southern Wales, Wessex, Sussex, Essex, and East Anglia. The term survives today in the name of the West Mercia Constabulary, commercial radio station Mercia FM in Coventry, and also in that of the new British Army infantry regiment, the Mercian Regiment.

A seafaring human nation on the southwest coast noted for its strong navy.