August 22, 1138Battle of the Standard at Northallerton in which King David I was defeated by the English.
August 1, 1166Dermot MacMurrough, King of Leinster and ally of Muirchertach Mac Lochlainn, is defeated in battle by Rory O'Connor
August 28, 1170Richard de Clare marries Aoife Ní Mhurrachadha and sets a precedent for Norman rule in Ireland
August 25, 1170Richard de Clare (Strongbow) marries MacMurroughs daughter Aoife, as part of an agreement made two years earlier
August 23, 1170Strongbow, a henchman of Henry II, arrives in Waterford at the behest of Dermot McMurrough
Ireland
Ireland