 He ruled from 710 to 722.The Cenél nEógain were expanding eastwards into Airgialla territory.In 711 Fergal mac Máele Dúin fought the Battle of Sliab Fuait (in the Fews, modern County Armagh) where the king of Uí Méith, Tnúthach son of Mochloinges, and Cú Raí mac Áedo of the Fir Cúl sept of the Síl nÁedo Sláine of Brega were slain.