Background (
Laighin) among the other kingdoms of
Gaelic Ireland In 1167,
Dermot MacMurrough was deposed as
King of Leinster by
Rory O'Connor, the
High King of Ireland. To recover his kingdom, Dermot went to
Aquitaine to ask
Henry II of England for assistance, but Henry limited his help to permitting the recruitment of English mercenaries. Dermot failed to recruit in
Wales but did meet Richard De Clare and the other lords of the
Welsh Marches. Dermot came to an agreement with Richard: If the latter helped the deposed king in the retaking of Leinster, he could have
Aoife, Dermot's eldest daughter, in marriage, along with the succession to the crown if it was regained. Since Henry II's letter to Dermot was general in nature, Richard wanted to obtain the king's specific consent to travel to Ireland. In 1168, he raised the issue at court and was granted permission.
Campaign in Ireland 's painting below Dermot and Richard raised a large army, commanded by
Raymond FitzGerald, which included
Welsh archers. The army sailed in
Ireland and took the
Ostman towns of
Wexford,
Waterford and
Dublin between 1169 and 1170. On 23 August 1170, Richard embarked on his ships at
Milford Haven to join the force; however, a royal messenger arrived to forbid him to go. Richard sailed anyway and ignored the king's wishes. Dermot died in May 1171, and his son
Donal MacMurrough claimed the kingdom of Leinster in accordance to the
Brehon laws. Richard, in turn, claimed the kingship in the right of his wife. At the same time, he sent his uncle,
Hervey de Montmorency, on an
embassy to Henry II to appease the king, who was growing worried with Richard's increasing power. Henry offered to return Richard's lands in
France,
England and Wales (which he had confiscated) in exchange for the conquered possessions in Ireland. Richard accepted and surrendered Dublin, Waterford and other fortresses to the English king, only keeping
Kildare. Henry crossed over to Ireland in October 1172 and stayed there for six months, stationing his own men where needed. His rule in Ireland was accepted by both the Gaelic and the Norman lords, and the relationship between him and Richard was restored. Richard, in fact, also agreed to help Henry with the
revolt in France in 1173, and, as a reward, he was given his possession of Leinster back. In 1174, he tried to advance into
Munster but was defeated in the
battle of Thurles. ==Death and succession==