c.680?685. Cædwalla of Wessex kills Æthelwealh of Sussex
Bede notes (HE, iv.15) that while Cædwalla was in exile before he became king, he took an army to Sussex and slew Æthelwealh and devastated the land. He was driven out by two of the king's ealdormen, Berhthun and Andhun, who ruled the South Saxons until Cædwalla became king of the West Saxons and came back and reduced it again. The first battle must have taken place before Cædwalla became king in 685.