Death of Muircheartach Ó Briain, king of Thomond. Succeeded by his brother, Diarmaid, who is expelled by Brian Bán Ó Briain
Toirdhealbhach Ó Conchobhair recovers kingship of Connacht from Aodh mac Aodh B reifneach. Makes peace with Mac Diarmada
King Niall Ó Domhnaill of Tir Conaill is deposed by his nephew Aonghus, with aid and support from O Baoighill, Ó Dochartaigh, the MacSweenys and Aodh Reamhar Ó Neill.
Clann Mhuircheartaigh expelled from Bréifne by Ualgharg Ó Ruairc, O Conchobhair, and Tadgh Mág Ragnaill. Given refuge by King Aonghus of Tír Conaill in Tír Aodha (Tirhugh, County Donegal).
October 26 Conchobhar Mac Diarmada, lord of Moylurg; succeeded by his brother, Fearghal
References
"The Annals of Ireland by Friar John Clyn", edited and translated with an Introduction, by Bernadette Williams, Four Courts Press, 2007. ISBN 978-1-84682-034-2, pp. 240-244.
"A New History of Ireland VIII: A Chronology of Irish History to 1976", edited by T. W. Moody, F.X. Martin and F.J. Byrne. Oxford, 1982. ISBN 0-19-821744-7.