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 in 1321 Lancaster and many of the barons seized the Despensers' lands and forced the King to exile them.
Isabella allied herself with the exiled Roger Mortimer, and invaded England with a small army in 1326.
Edward's regime collapsed and he fled into Wales, where he was captured in November.
Edward's relationship with Gaveston inspired Christopher Marlowe's 1592 play Edward II, along with other plays, films, novels and media.
The precise nature of Edward and Gaveston's relationship is uncertain; they may have been friends, lovers or sworn brothers.
Gaveston's arrogance and power as Edward's favourite provoked discontent both among the barons and the French royal family, and Edward was forced to exile him.
On his return, Edward I signed a peace treaty, under which he took Philip's sister, Margaret, as his wife and agreed that Prince Edward would in due course marry Philip's daughter, Isabella, who was then only two years old.
In the spring of 1301, the King declared Edward the Prince of Wales, granting him the earldom of Chester and lands across North Wales; he seems to have hoped that this would help pacify the region, and that it would give his son some financial independence.
Edward I proved to be a successful military leader, leading the suppression of the baronial revolts in the 1260s, and joining the Ninth Crusade.