Name the King of Wessex from 839 to 858 whose father, King Egbert, defeated Beornwulf of Mercia and who himself led the Battle of Aclea between the West Saxons and the Danish Vikings?
Battle of Aclea The Battle of Aclea occurred in 851 between the West Saxons led by Æthelwulf, King of Wessex and the Danish Vikings. It resulted in a West Saxon victory.
Æthelfrith Æthelfrith (died c. 616) was King of Bernicia from c. 593 until his death. Around 604 he became the first Bernician king to also rule the neighboring land of Deira, giving him an important place in the development of the later kingdom of Northumbria. He was especially notable for his successes against the Britons and his victory over the Gaels of Dál Riata. Although he was defeated and killed in battle and replaced by a dynastic rival, his line was eventually restored to power in the 630s.