 On the death of Fergal, the Uí Néill kingship of Tara passed to Fogartach mac Néill of the Síl nÁedo Sláine of South Brega, whose nominal High Kingship was ended in 724 when he was killed fighting against his Síl nÁedo Sláine kinsman Cináed mac Írgalaid of North Brega, who became the new overking of the Uí Néill.Cináed retained the overlordship of the Uí Néill for less than four years, being killed in battle at Druim Corcain against the Cenél Conaill king Flaithbertach mac Loingsig, who took the overlordship of the Uí Néill.Flaithbertach himself reigned for only a few years before Áed Allán of the Cenél nEógain, son of Fergal mac Máele Dúin, fought him for the leadership of the Uí Néill, beginning in 732 and continuing through several battles until Flaithbertach abdicated and entered a monastery in 734.