Battle of Ellendun (825)
The Battle of Ellendun was fought between the forces of Egbert of Wessex and the forces of Beornwulf of Mercia at today’s Wrounghton in Wiltshire in 825. Egbert decisively defeated the Mercians and received the submission of kingdoms of Kent, Essex, Surrey and Sussex. In 828, he subdued Mercia and secured the nominal submission of Northumbria one year later becoming the first Anglo-Saxon king who ruled over all England. His authority varied from kingdom to kingdom and from year to year, while the concept of the Kingdom of England as such did not exist in that period.