 In 1166 , Mac Murrough had fled to Anjou , France , following a war involving Tighearnán Ua Ruairc , of Breifne , and sought the assistance of the Angevin king , Henry II , in recapturing his kingdom . In 1171 , Henry arrived in Ireland in order to review the general progress of the expedition . He wanted to re @-@ exert royal authority over the invasion which was expanding beyond his control . Henry successfully re @-@ imposed his authority over Strongbow and the Cambro @-@ Norman warlords and persuaded many of the Irish kings to accept him as their overlord , an arrangement confirmed in the 1175 Treaty of Windsor . 
 In 1166 , Mac Murrough <a href='been_done' title='1'><mark>had</mark></a> fled to Anjou , France , following a war involving Tighearnán Ua Ruairc , of Breifne , and sought the assistance of the Angevin king , Henry II , in recapturing his kingdom . In 1171 , Henry arrived in Ireland in order to review the general progress of the expedition . He wanted to re @-@ exert royal authority over the invasion which was expanding beyond his control . Henry successfully <a href='uninflect' title='2'><mark>re</mark></a> @-@ imposed his authority over Strongbow and the Cambro @-@ Norman warlords and persuaded many of the Irish kings to accept him as their overlord , an arrangement confirmed in the 1175 Treaty of Windsor . 
In 1166 , Mac Murrough done fled to Anjou , France , following a war involving Tighearnán Ua Ruairc , of Breifne , and sought the assistance of the Angevin king , Henry II , in recapturing his kingdom . In 1171 , Henry arrived in Ireland in order to review the general progress of the expedition . He wanted to re @-@ exert royal authority over the invasion which was expanding beyond his control . Henry successfully red @-@ imposed his authority over Strongbow and da Cambro @-@ Norman warlords and persuaded many of tdaIrish kings to accept him as their overlord , an arrangement confirmed in the 1175 Treaty of Windsor .