Wars of Scottish Independence the Bruce following his killing of The Red Comyn in Dumfries in 1306 to his and the Scottish victory at Bannockburn in 1314; and a final phase of Scottish diplomatic initiatives and military campaigns in Scotland, Ireland and Northern England from 1314 until the Treaty of Edinburgh-Northampton in 1328. The war began in earnest with Edward I's brutal sacking of Berwick in March 1296, followed by the Scottish defeat at the Battle of Dunbar and the abdication of John Balliol in July. The English invasion campaign had subdued most of the country by August and, after removing the Stone of
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