Athelfrith of Bernicia
In 595 a large force of Britons, Gaels and Picts came together at Din Eydin (Edinburgh). They attacked the Angles of Bernicia at a place identified as Catterick. Among those killed at this battle called Catraeth, was Owen of Rheged, Athelfrith's enemy. Owen had killed Athelfrith's father, Athelric. The remaining force of Britons, Gaels and Picts was completely defeated, most of them being killed. In 603 Athelfrith fought another great battle at a place called Degsastan. Dál Riatan Scots, under their king Aedan mac Gabrain came against the English and were completely defeated. Athelfrith's victory eliminated the Scots as a threat for a long period of time in northern Britain. Bede, writing in 731, wrote that up to his day no king of the Scots had attempted to wage war against the northern English again. The only remaining enemy to cause Athelfrith any concern was the Britons of Strathclyde.