Robert de Clifford, 1st Baron de Clifford four children: Clifford was killed on 24 June 1314 fighting at the Battle of Bannockburn and was buried at Shap Abbey in Westmoreland. Robert de Clifford, 1st Baron de Clifford Robert de Clifford, 1st Baron de Clifford (1 April 1274 - 24 June 1314), of Appleby Castle, Westmorland, feudal baron of Appleby and feudal baron of Skipton in Yorkshire, was an English soldier who became 1st Lord Warden of the Marches, responsible for defending the English border with Scotland. He was born at Clifford Castle, Herefordshire, a son of Roger II de Clifford (d.1282) (a grandson of Walter II de
Richard Óg de Burgh, 2nd Earl of Ulster of King Robert the Bruce of Scotland. However, this did not stop him leading his forces from Ireland to support England's King Edward I in his Scottish campaigns and when the forces of Edward Bruce invaded Ulster in 1315, the Earl led a force against him, but was beaten at Connor in Antrim. The invasion of Bruce and the uprising of Felim Ó Conchúir in Connacht left him virtually without authority in his lands, but Ó Conchúir was killed in 1316 at the Second Battle of Athenry, and he was able to recover Ulster after the defeat of Bruce at