Battle of Bannockburn Battle of Bannockburn The Battle of Bannockburn ( or ) on 23 and 24 June 1314 was a significant Scottish victory by King of Scots Robert the Bruce against the army of King Edward II of England in the First War of Scottish Independence. Though it did not bring overall victory in the war, which would go on for 14 more years, it was a landmark in Scottish history. King Edward invaded Scotland after Bruce demanded in 1313 that all supporters still loyal to ousted Scottish king John Balliol acknowledge Bruce as their king or lose their lands. Stirling Castle,
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