Editing Provinces of Ireland (section)

===Later medieval period===
After a period of dynastic infighting in the early 12th century, Osraige fragmented and after a heavy defeat at the hands of High-King [[Muirchertach Mac Lochlainn]] became part of Laigin. In 1169, the king of Osraige, [[Mac Giolla Phádraig dynasty|Domnall Mac Gilla Pátraic]], hired the Norman knight [[Maurice de Prendergast]] to resist the Laigin king, [[Diarmait Mac Murchada]], who had also recruited Norman aid.<ref name="DuffyMedieval32"/>

In 1118, the king of Connacht, [[Tairrdelbach Ua Conchobair]], aided the [[Mac Cárthaigh]] of south Munster in a rebellion against the ruling [[Uí Briain]] dynasty.<ref name="DuffyMedieval458"/> This resulted in the division of Mumu into two: {{lang|ga|Tuadmumu}} ([[Thomond]], meaning "north Munster") to the north under the Uí Briain; and {{lang|ga|Desmumu}} ([[Kingdom of Desmond|Desmond]], meaning "south Munster") to the south under the Mac Cárthaigh.<ref name="DuffyMedieval458"/> Ua Conchobair would then conquer the heartland of the Uí Briain situated around modern [[County Clare]] and make it part of Connacht.<ref name="DuffyMedieval458"/> This was to force them to accept [[Cormac Mac Carthaig]], king of Desmumu, as the king of Mumu.<ref name="DuffyMedieval458"/> Despite Ua Conchobair's aid, Mac Carthaig and the Uí Briain would form an alliance to campaign against Connacht's hegemony, and by 1138 ended the threat from that kingdom.<ref name="DuffyMedieval458"/> The following decades would see Mumu united and repartitioned several times as the Uí Briain and Mac Cárthaigh vied for complete control.<ref name="DuffyMedieval458"/> In 1168, the king of Connacht, [[Ruaidrí Ua Conchobair]], ensured Mumu remained divided.<ref name="DuffyMedieval458"/> After [[Henry II of England|Henry II]], [[king of England]], landed in Ireland in 1171, the Mac Cárthaigh submitted to him to prevent an Uí Briain invasion.<ref name="DuffyMedieval458"/> The Uí Briain eventually followed suit in submitting to Henry II.<ref name="DuffyMedieval458"/> The eagerness of these submissions encouraged Henry II to revive the papal grant, [[Laudabiliter]], for Ireland.<ref name="DuffyMedieval458"/>