Robert Bruce, Lord of Liddesdale IV, Earl of Fife carried out an unsuccessful attempt on 6 August 1332 to repel the landing at Kinghorn in Fife. He then quarrelled with the regent, Donald II, Earl of Mar. He was killed leading a charge at the Battle of Dupplin Moor on 11 August 1332. Robert Bruce, Lord of Liddesdale Sir Robert Bruce, Lord of Liddesdale (died 11 August 1332) was an illegitimate son of King Robert the Bruce and an unknown mother. He was knighted and awarded the royal arms at the Battle of Bannockburn. His father made him Lord of Liddesdale after William II de
Robert the Bruce planned a major military campaign with the support of Lancaster and the barons, mustering a large army of between 15,000 and 20,000 men. In the spring of 1314, Edward Bruce laid siege to Stirling Castle, a key fortification in Scotland whose governor, Philip de Mowbray, agreed to capitulate if not relieved before 24 June 1314. In March, James Douglas captured Roxburgh, and Randolph captured Edinburgh Castle, while in May, Bruce again raided England and subdued the Isle of Man. News of the agreement regarding Stirling Castle reached the English king in late May, and he decided to speed his march