1150
A.D. 1150. Domhnall son of Aodh Ó Conchobhair was killed by Ruaidhrí son of Toirdhealbhach Ó Conchobhair.
1151
A.D. 1151. Muircheartach son of Toirdhealbhach son of Diarmaid Ó Briain made an alliance with [the men of] Thomond and deposed his own father. Tadhg son of Diarmaid Ó Briain and Diarmaid Súgach Ó Conchobhair captured Muircheartach by treachery, and he was detained by Toirdhealbhach.
Tadhg son of Diarmaid Ó Briain turned against Toirdhealbhach,
A contention was begun by Sliocht Eóghain Mhóir against Síol Briain, Ó Conchobhair Ciarraighe, and Toirdhealbhach son of Ruaidhrí [Ó Conchobhair]. They made Diarmaid son of Cormac Muighe Thamhnach son of Muireadhach Mac Carthaigh their king, and going into Ciarraighe Luachra they spent a night there burning and plundering. On the following day they were routed by the Ciarraighe at the head of Sliabh Mis and they suffered slaughter. Toirdhealbhach Ó Briain and Diarmaid Sidgach Ó Conchobhair came with a very large force together with their trains across the Shannon and into Ciarraighe to meet each other in Uí Chonaill. They banished Diarmaid son of Cormac Muighe Thamhnach southwards across Móin Mhór to Donnchadh son of Cian son of Donnchadh Donn Ó Mathghamhna. The Uí Mhuircheartaigh, the Uí Fháilbhe and all from Sliabh Mis southwards fled to Féardhruim in Uí Eachach. It was at this time that Diarmaid Súgach Ó Conchobhair took seven ships on wheels from Eas Duibhe to Loch Léin. From Limerick to Cork, and from Waterford to Cnoc Bréanainn was laid waste in this war. Síol Briain pursued Diarmaid Mac Carthaigh through Múiscraighe southwards to Ceann Eich to plunder it. Diarmaid son of Cormac and the nobles of the Eóghanachta sent messengers to ask [the support of] Toirdhealbhach son of Ruaidhrí, king of Connacht, and Diarmaid Mac Murchadha, king of Leinster, against Síol Briain. It was the night the Connachtmen and the Leinstermen came to Abha Mhór that Síol Briain came to Cork. They set out on the following day through Móin Mhór northwards, having committed many outrages on the community of Barra; and Cormac's son, the Uí Mhathghamhna, the Uí Dhonnchadha, the Uí Chaoimh, and the Uí Mhuircheartaigh, as well as the nobles of the Eóghanacht, were at their rear in pursuit of them. The day being misty, Síol Briain did not perceive the Connachtmen and the Leinstermen until they found themselves in their midst. Síol Briain were defeated by these three hostings, and Conchobhar Ó Briain, Flaithbheartach Ó Deadhaidh, Aineislis Ó Gráda, and three thousand others of the host were slain. Toirdhealbhach Ó Briain and Diarmaid Súdgach Ó Conchobhair, with a few
The king of the Deise, Muircheartach Ó Bric, was put to death by Diarmaid son of Cormac Muighe Thamhnach while his prisoner, having been captured by him at Lismore a long time before.
1152
A.D. 1152. Toirdhealbhach Ó Briain came to Ciarraighe to support Ó Conchobhair against Cormac's son. Diarmaid son of Cormac, with the nobles of Sliocht Eóghain Mhóir, went against him to Ciarraighe, and he drove Toirdhealbhach and Diarmaid Súgach out of the territory, and destroyed and plundered the whole territory, and he put Mac Beathadh and Mac Craith, two sons of Diarmaid Súgach's father, by his own authority over the territory.
Peace was made by Toirdhealbhach Ó Briain and his kinsman Tadhg, and they made great forays in Uí Chonaill on Cormac's son.
Ó Cuiléin went into Ciarraighe and burned Ard Fearta Bréanainn to the detriment of the nobles of Diarmaid Ó Conchobhair.
Cork, Imleach Iubhair, Lismore, and Cúil Chollainge were burned in the same year.
Fínghin son of Mac Carthaigh was killed by the Uí Shúilleabháin after he had been taken by force the monks [in a dispute] concerning division of booty at Leac Lachtáin. It was Gearr Uille's son who struck him on the head with an axe.
1153
Tadhg son of Diarmaid Ó Briain turned against Toirdhealbhach, his own kinsman, in violation of relics and sureties, and joined with Diarmaid son of Cormac Muighe Thamhnach [Mac Carthaigh], Toirdhealbhach son of Ruaidhrí Ó Conchobhair, king of Connacht, and Diarmaid Mac Murchadha, king of Leinster, and they banished Toirdhealbhach son of Diarmaid Ó Briain to Cinéal Eóghain to Muircheartach son of Niall Ó Lochlainn.
A hosting by Tadhg son of Diarmaid Ó Briain, Murchadh son of Mac Murchadha, Maol Sheachlainn Crosach [Ó Maoil Sheachlainn], king of Midhe, and Ruaidhrí son of Toirdhealbhach son of Ruaidhrí Ó Conchobhair to Áth Maighne in Iarthar Midhe.
A hosting by Muircheartach son of Niall Ó Lochlainn, king of Cinéal Eóghain, Donnchadh Ó Cearbhaill with the Ulaidh and Cinéal Conaill, and Toirdhealbhach son of Diarmaid Ó Briain to Áth Maighne against Tadhg Ó Briain, and they threw them [i.e. the forces of Tadhg Ó Briain] out of their three encampments and killed nine hundred of them. Toirdhealbhach Ó Briain and [the men of] the north of Ireland stayed at Teach Tille that night, celebrating the triumph.
A great famine in Munster this year owing to the extent of the war, and it spread throughout Ireland in all directions.
Tadhg son of Diarmaid Ó Briain was blinded through the miracles of the clergy and the relics of Ireland, which were security between him and Toirdhealbhach Ó Briain, his kinsman.
1154
A.D. 1154. Bernard, abbot of Clairveaux, head of the monks of Ireland and of all Europe, died.
Diarmaid Súgach son of Mathghamhain Ó Conchobhair, king of Ciarraighe and Corca Dhuibhne, died after much suffering.
Toirdhealbhach son of Diarmaid Ó Briain came to Munster again, and the foray of Móin Mhór was made by him on Diarmaid son of Cormac [Mac Carthaigh]. Cormac's son immediately made a foray against him in reprisal.
Tadhg son of Diarmaid Ó Briain died at Lismore unknown to his attendants.
A hosting by Muircheartach son of Niall [Ó Lochlainn] past Eas Ruaidh into Connacht, and he destroyed Magh n-Aoi, Magh Luirg and Dún Iomdháin. They went through Connacht past Áth Liag eastwards, and from thence to Dublin, the kingship of which they took.
1155
A.D.1155. Amhlaoibh Ó hEidirsgeóil, king of Corca Laoighdhe, was killed in front of the church of Bréanainn of Birr.
1156
A.D. 1156. Cuiléan Ó Cuiléin, king of Uí Chonaill Gabhra, was killed by Ó Cinn Fhaoladh, and he himself was killed forthwith in retribution.
Toirdhealbhach son of Aodh an Gha Bhearnaigh son of Ruaidhrí na Soidhe Buidhe [Ó Conchobhair], high-king of the Teóra Connachta, defenders of Ireland, and its king with opposition according to some, died.
1157
A.D. 1157. A foray by Tighearnán Ó Ruairc into Leinster. Diarmaid Mac Murchadha and the Galls of Dublin overtook him at Cuasán Í Bhraoin and put him and the men of Bréifne to flight.
Lismore, including houses and churches, was burned for the most part.
Daimhinis was burned, including houses and churches.
1158
A.D. 1158. A hosting by Muircheartach son of Niall Ó Lochlainn together with [the men of] the north of Ireland came to Limerick to demand hostages from Toirdhealbhach son of Diarmaid Ó Briain.
Brian son of Donnchadh Ó Briain and Donnchadh son of Aodh Ó Cearbhaill, son of the king of the Eóghanacht Locha Léin, killed each other, after they had killed the son of Aodh Ó Ceallachain, two of the Uí Dhonnchadha, and many others on the same day.
A hosting by Ruaidhrí son of Toirdhealbhach Ó Conchobhair, king of Connacht, and Tighearnán Ó Ruairc to Áth na Casbearna in the territory of Uí Sheaghain. A hosting by Muircheartach son of Niall Ó Lochlainn and Donnchadh Ó Cearbhaill to meet them there. A battle was fought between them, in which the Connachtmen, the Uí Bhriúin, and the Conmhaicne were routed, and slaughter inflicted on them.
Amhlaoibh son of Aonghus Ó Donnchadha went on a foray to Uaithne, and Ó hIfearnáin, Ó Cathail, and many others were killed by him.
Conchobhar son of Domhnall Ó Briain and his son were blinded by Toirdhealbhach son of Diarmaid Ó Briain.
The great church of Achadh Dá Eó was completed by Amhlaoibh son of Aonghus Ó Donnchadha.
The same Amhlaoibh Ó Donnchadha, high king of Eóghanachta Locha Léin, usurper of West Munster, was killed in Magh Breoghain on the bank of the Suir by Muircheartach son of Toirdhealbhach Ó Briain and [the men of] Thomond, and Mathghamhain son of Mathghamhain son of Mac Carthaigh was killed with him. His own family and his people took the body of Amhlaoibh to Achadh Dá Eó, and he was honourably buried by them with hymns and psalms and Masses on the right side of the church which he himself had built in honour of the Trinity and Mary.
A hosting by Muircheartach son of Niall [Ó Lochlainn] with the Oirghialla, the Ulaidh, and Cinéal Conaill into Connacht, and they destroyed Dún Mór and many other towns, and returned home without peace or battle.
A hosting by Muircheartach son of Niall [Ó Lochlainn] with [the men of] the north of Ireland, and they gave the kingship of Midhe, to Donnchadh Ó Maoil Sheachlainn, and they plundered the Uí Fhionnaláin and the greater part of Dealbhna.
1159
A.D. 1159. Aodh Ó hOisin, the archbishop from whom Giolla Aodha of Cork is named, died.
Donnchadh Ó Maoil Sheachlainn, king of Midhe, was treacherously killed by the Uí Fhionnaláin.
Domhnall son of Maol Muaidh [Ó Mathghamhna], king of Cinéal mBécce, was killed by the Uí Mhathghamhna.