The Burke/de Burgh Civil War was a conflict in Ireland in the 1330s between three leading members of the de Burgh (Burke/Bourke) family.
William Donn de Burgh, 3rd Earl of Ulster, was murdered by his household knights in June 1333. His only child, Elizabeth de Burgh (1332–1363), succeeded as Countess of Ulster and legal heir to the de Burgh estate as an infant. But because she was an infant, and a female, she was taken by her mother to England for safety.
Meanwhile, three members of the de Burgh family fought against each other in an attempt to preserve their own personal estates, and overall control of the massive de Burgh inheritance in Ireland. They were:
The eventual outcome of the war was the loss of almost all the de Burgh lands in Ulster, which was reconquored within a year by the Gaelic-Irish.
The remaining de Burghs in Ireland fragmented into three distinct clans, all of which had several sub-septs. They were: