who had defeated Áed Allán's father in 722, was also killed. The Annals of Ulster say:And men say that so many fell in this great battle that we find no comparable slaughter in a single onslaught and fierce conflict throughout all preceding ages. This defeat seems to have crushed the Uí Chennselaig as, for almost three centuries after the battle of Áth Senaig, the Uí Dúnlainge dominated the kingship of Leinster. Áed Allán died in 743, in battle at Seredmag, defeated by Domnall Midi of Clann Cholmáin. The Annals quote a verse supposedly composed by Áed Allán on the day of battle:If my dear God had spared meOn the shore of Loch Sailchedáin,Were I to commit sin thereafter,It would have been like giving valuables to a slave. Áed Allán was succeeded as High King by Domnall Midi. According to some lists Niall Frossach followed him as King of Ailech, but others disagree. Flaithbertach's son Áed Muinderg is called rí in Tuaisceart—King of the North, a title apparently meaning that he was acknowledged as chief ruler among the northern Uí Néill and perhaps as Domnall Midi's deputy—at his death in 764. His son Máel Dúin mac Áedo Alláin (died 788) later became king of Ailech. References Byrne, Francis John, Irish Kings and High-Kings. Batsford, London, 1973. Ó Cróinín, Dáibhí, Early Medieval Ireland: 400–1200. Longman, London, 1995. External links CELT: Corpus of Electronic Texts at University College Cork The Corpus of Electronic Texts includes the Annals of Ulster, Tigernach and the Four Masters as well as Genealogies, and various Saints' Lives. Most are translated into English, or translations are in progress. Fergal's Prophecy by Dan M. Wiley. 8th-century Irish people 743 deaths High Kings of Ireland People from County Tyrone 8th-century Irish monarchs