Oswiu, king of Bernicia and Northumbria, (d.670)
After the invasion of Cadwallon, Northumbria collapsed into it's two component parts, Deira and Bernicia. Oswiu became king of Bernicia in the aftermath of that collapse. In 651 he invaded Deira in an attempt to reunit the kingdom, but although he deposed the existing king, he was unable to replace him. In 654 he was attacked by Penda of Mercia, who considered him a personal enemy, and killed Penda at Winwaed, near Leeds. After that victory he was able to rule Mercia as a Northumbrian province until a revolt in 657 restored Mercian independance. After that he remained a purely Northumbria king until his death in 670.
How to cite this article: Rickard, J. (20 September 2000), Oswiu, king of Bernicia and Northumbria, (d.670), http://www.historyofwar.org/articles/people_oswiu.html