An isolated reference in the Annals of Ulster for the year 733 has 'the overthrow of Cathal by Domnall in Tailtiu, and the overthrow of Fallomun by Cathal in Tlachtga'. The consensus view among historians is that the Cathal mentioned was Cathal mac Finguine (died 742), King of Munster. However, the historian Charles-Edwards argues in favor of Cathal mac Áeda. He cites the lack of mention of this event in the Munster oriented Annals of Innisfallen. This theory proposes that Domnall attacked Cathal at Tailtiu, where the Uí Néill high kings traditionally held their main óenach. He was attacked there by Domnall Midi of the Clann Cholmáin branch and defeated. This was a step in the rise to Domnall as high king. Cathal however defeated the minor Uí Néill kindred of Clann Cholmáin Bicc under Fallomon mac Con Congalt at Tlachtga, the Hill of Ward, the site of another major Uí Néill óenach.