Айдан
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.