Edward Bruce pact with the English governor of Stirling Castle, which led to the English sending a large army to relieve the castle. This led to the Battle of Bannockburn on 23–24 June 1314, where he commanded a Scottish schiltrom. Some time between 1309 and 1313, Edward was created Earl of Carrick, a title previously held by his maternal grandfather Niall of Carrick, his mother and his elder brother. It is unclear if he was ever married. He did have an illegitimate son, Alexander Bruce, who would later inherit his father's earldom. By the early 14th century, Ireland had not had a
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