" Aquitaine, or Gascony as the English preferred to call it, was actually a duchy subject to the French crown which had been inherited by English kings after the marriage of Eleanor of Aquitaine and Henry II. Its status had long been a source of dispute and conflict between the two kingdoms, leading ultimately to the outbreak of the Hundred Years War in 1337. "

― Juliet Barker , England, Arise: The People, the King and the Great Revolt of 1381