 The annals record that the Ui Cheinnselaig king Laidcnén mac Con Mella was slain at the Battle of Maistiu (Mullaghmast in south County Kildare) in 727 by the Leinster king Dúnchad mac Murchado (died 728).The king lists in the "Book of Leinster", have him succeeded by Élothach mac Fáelchon who ruled for seven years before being slain by Áed mac Colggen at the Battle of Oenbethi who then is listed as king.In 722 Leinster faced an invasion by Fergal mac Máele Dúin of the Cenél nEógain, High King of Ireland, seeking to impose his overlordship on Leinster.