Ireland

The Synod of Cashel, the Bishops of Ireland, under duress, pledge allegiance to Henry II of England

The Synod of Cashel of 1172, also known as the Second Synod of Cashel, was assembled at Cashel at the request of Henry II of England shortly after his arrival in Ireland in October 1171.

Henry II, fearful that Strongbow will grow too powerful in Ireland, lands at Waterford with an army

MacMurrough and the Normans march on the Norse kingdom of Dublin

In 1170, Diarmait Mac Murchada, the deposed King of Leinster, led an expedition to retake power in Ireland with the help of Norman mercenaries, notably Richard de Clare, better known as Strongbow. After their success at Wexford and Waterford, MacMurrough and the Normans marched on Dublin, a key Norse-Gaelic stronghold and a strategic target.

Richard de Clare marries Aoife Ní Mhurrachadha and sets a precedent for Norman rule in Ireland

Richard de Clare (Strongbow) marries MacMurroughs daughter Aoife, as part of an agreement made two years earlier

Strongbow, a henchman of Henry II, arrives in Waterford at the behest of Dermot McMurrough

Richard de Clare, known as Strongbow, landed at Waterford with a force of Anglo-Norman knights at the invitation of Diarmait Mac Murchada, the deposed King of Leinster. In exchange for military support to reclaim his throne, Mac Murchada had promised Strongbow his daughter Aoife in marriage and the succession to the kingship of Leinster.

First Normans land in Ireland

In 1169 there occurred one of the most important events in the history of Ireland - the Norman invasion. Ireland in the century prior to the Anglo-Norman invasion of 1169 is probably best described as a national kingdom lacking a settled monarchy

Dermot MacMurrough, King of Leinster and ally of Muirchertach Mac Lochlainn, is defeated in battle by Rory O'Connor

Dermot MacMurrough, also known as Diarmait Mac Murchada, was the King of Leinster and a significant figure in Irish history, particularly known for his role in the Norman invasion of Ireland. His reign and actions had profound consequences for the future of Ireland.

A proposal for the invasion of Ireland by Henry II is discussed

A Proposal for the Invasion of Ireland by Henry II is discussed at the Council of Winchester. The council rejects the plan initially. However, shortly afterward, King Henry II of England secures a papal privilege from Pope Adrian IV (the only English pope), authorizing the invasion of Ireland to reform the Irish Church and bring it under Roman discipline.

King David I died at Carlisle and Malcolm IV crowned at Scone.