Duke of Aquitaine House of Valois claimed supremacy over Aquitaine. In 1360, both sides signed the Treaty of Bretigny, in which Edward renounced the French crown but remained sovereign Lord of Aquitaine (rather than merely duke). However, when the treaty was broken in 1369, both these English claims and the war resumed. In 1362, King Edward III, as Lord of Aquitaine, made his eldest son Edward, Prince of Wales, Prince of Aquitaine. In 1390, King Richard II, son of Edward the Black Prince appointed his uncle John of Gaunt Duke of Aquitaine. This grant expired upon the Duke's death, and the dukedom reverted
Edward the Black Prince steel". Richard Barber suggests that the name's origins may have lain in pageantry, in that a tradition may have grown up in the 15th century of representing the prince in black armour. He points out that several chronicles refer to him as Edward the IV (the title he would have taken as King had he outlived his father): this name would obviously have become confusing when the actual Edward IV succeeded in 1461, and this may have been the period when an alternative had to be found. Edward's reputation for brutality in France is also well documented, and it is