Áedán mac Gabráin
The Battle of Degsastan was fought around 603 between king Æthelfrith of Bernicia and the Gaels under Áedán mac Gabráin, king of Dál Riada. Æthelfrith's smaller army won a decisive victory, although his brother Theodbald was killed. Very little further is known about the battle. The location of the nominal Degsastan is not known, either; Dawstane in Liddesdale, Scotland, is a possibility.