Edward II of England barons banished Gaveston, to which Edward responded by revoking the reforms and recalling his favourite. Led by Edward's cousin, the Earl of Lancaster, a group of the barons seized and executed Gaveston in 1312, beginning several years of armed confrontation. English forces were pushed back in Scotland, where Edward was decisively defeated by Robert the Bruce at the Battle of Bannockburn in 1314. Widespread famine followed, and criticism of the king's reign mounted. The Despenser family, in particular Hugh Despenser the Younger, became close friends and advisers to Edward, but Lancaster and many of the barons seized the Despensers' lands
Robert the Bruce gained first-hand knowledge of the city's defences. The next time Carlisle was besieged, in 1315, Robert the Bruce would be leading the attack. Edward I responded to King John's alliance with France and the attack on Carlisle by invading Scotland at the end of March 1296 and taking the town of Berwick in a particularly bloody attack upon the flimsy palisades. At the Battle of Dunbar, Scottish resistance was effectively crushed. Edward deposed King John, placed him in the Tower of London, and installed Englishmen to govern the country. The campaign had been very successful, but the English triumph would