Anglo-Norman Invasion of Ireland - Invasion of 1169

Invasion of 1169

After losing the protection of Tyrone Chief, Muirchertach Mac Lochlainn, High King of Ireland, who died in 1166, MacMorrough was forcibly exiled by a confederation of Irish forces under the new High King, Rory O'Connor. MacMurrough fled first to Bristol and then to Normandy. He sought and obtained permission from Henry II of England to use the latter's subjects to regain his kingdom. Having received an oath of fealty from Dermod, Henry gave him letters patent in the following words:

Henry, King of England, duke of Normandy and Aquitaine, and earl of Anjou, to all his liegemen, English, Norman, Welsh and Scotch, and to all the nations under his dominion, greeting. When these letters shall come into your hands, know ye, that we have received Dermod, Prince of Leinster, into the bosom of our grace and benevolence. Wherefore, whosoever, in the ample extent of all our territories, shall be willing to assist in restoring that prince, as our vassal and liegeman, let such person know, that we do hereby grant to him our licence and favour for the said undertaking.

By 1167 MacMurrough had obtained the services of Maurice Fitz Gerald and later persuaded Rhys ap Gruffydd Prince of Deheubarth to release Fitz Gerald's half-brother Robert Fitz-Stephen from captivity to take part in the expedition. Most importantly he obtained the support of the Earl of Pembroke Richard de Clare, known as Strongbow.

The first Norman knight to land in Ireland was Richard fitz Godbert de Roche in 1167, but it was not until 1169 that the main body of Norman, Welsh and Flemish forces landed in Wexford. Within a short time Leinster was conquered, Waterford and Dublin were under Diarmait's control. Strongbow married Diarmait's daughter, Aoife, and was named as heir to the Kingdom of Leinster. This latter development caused consternation to Henry II, who feared the establishment of a rival Norman state in Ireland. Accordingly, he resolved to visit Leinster to establish his authority.

Read more about this topic:  Anglo-Norman Invasion Of Ireland

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