he had forced Máel Sechnaill to submit to him, and now claimed kingship over the whole of Ireland. In the following decade, there were several campaigns in the north to force the Ulaid and the Northern Uí Néill into submission as well. Even if faced with multiple rebellions, both in the north and in Leinster, by 1011 he had received submission from every major regional king in Ireland, and thus earned the recognition by historians as the first real king of Ireland. During his visit to Armagh in 1005, he had his secretary add a note to the Book of Armagh where he is proclaimed as Imperator Scottorum (emperor of the Irish). According to Bart Jaski, "This can be regarded as a claim that he ruled both the Irish and the Norse in Ireland, and may even imply suzerainty over the Gaels of Scotland". In his obituary in the Annals of Ulster he is styled as "over-king of the Irish of Ireland, and of the foreigners and of the Britons, the Augustus of the whole of north-west Europe". In 1012, Flaithbertach Ua Néill revolted against Brian, and the following year Máel Mórda of Leinster and Sigtrygg of Dublin did too. The latter led to the famous battle of Clontarf, where Brian was killed, even if his army was victorious over Máel Mórda, Sigtrygg and their allies. Sigurd Hlodvirsson, Earl of Orkney as well as forces from Man participated on the Dublin/ Leinster side, and this may, in conjunction with the propagandistic account of the battle given in the Cogad, have created the still popular myth that what took place at Clontarf Good Friday 1014 was a decisive battle where the Irish defeated Viking invaders and were liberated from oppression (Duncan) Donnchadh Ó Corráin was one of the first to publicly debunk this national myth, in his groundbreaking Ireland before the Normans from 1972: Following Brian's death, Máel Sechnaill resumed as High King, supported by Flaithbertach ua Néill. In Munster, internal strife almost immediately began between Brian's sons Donnchad and Tadc, and Dúngal Ua Donnchada of Eóganachta also claimed the kingship of the province. Though Donnchad (Duncan) eventually was victorious, the descendants of Brian would not be able to make a real claim to kingship over Ireland again until Toirdelbach Ua Briain. In Leinster, the defeat at Clontarf and death of Máel Mórda seriously weakened the Uí Dúnlainge, and opened the