In 1166, Diarmait Mac Murchada was banished from Ireland by the High King Ruaidrí Ua Conchobair for the abduction of Lady of Meath Derbforgaill ingen Maeleachlainn, wife of Tigernán Ua Ruairc, King of Breifne. Mac Murchada returned with Norman allies and landed at Bannow in Wexford in 1169, after which they conquered northward throughout 1169–70, initiating the Norman Invasion of Ireland. In response, the High King assembled an alliance which included King Magnus Ua Máel Sechlainn of Meath as well as soldiers from Connacht, Breifne and Dublin along with their respective kings. They confronted Mac Murchada's forces at Ferns and an agreement was reached whereby Mac Murchada was acknowledged as king of Leinster, in return for acknowledging Ruaidrí as his overlord and agreeing to send his foreign allies away permanently. However, Mac Murchada breached the agreement and enlisted more Normans to his side before continuing his conquests, capturing Dublin in 1171 and forcing the capitulation of Magnus Ua Máel Sechlainn.