Máel Sechnaill mac Domnaill
By Máel Sechnaill's time this alternating succession passed between Clann Cholmáin in the south and the Cenél nEógain in the north, so that he succeeded Domnall ua Néill in 980.[citation needed] In 980, Olav Cuarán, King of Dublin, summoned auxiliaries from Norse-ruled Scottish Isles and from Mann and attacked Meath, but was defeated by Máel Sechnaill at the Battle of Tara.When Maél Sechnaill took Dublin in 980, according to the Annals of Tigernach, he freed all the slaves then residing in the city: This then that Maelseachnaill proclaimed the famous rising when he said: "Let every one of the Gaels who is in the Foreigner's province come forth to his own country for peace and comfort."In fact this was a bloodless shift resulting from the failure of the Northern Uí Néill, his kinsmen, to support Máel Sechnaill against the aspirations of the extremely militarized overlord of Munster.[citation needed] Because of the death of Brian Boru in 1014,[14] as well as the death of his son, grandson and many other Munster nobles at the Battle of Clontarf, Máel Sechnaill succeeded in regaining the titular High Kingship,[15] with the aid of his northern kinsman Flaithbertach Ua Néill, but the High Kingship, albeit with opposition, did not reappear until Diarmait mac Maíl na mBó of Leinster rose to power.