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 he returned to England, leaving John in charge of Sir Walter Manny and three other knights. He accompanied his father to Calais on 9 October to assist at the liberation of King John and the ratification of the treaty. He rode with John to Boulogne, where he made his offering in the Church of the Virgin. He returned with King Edward to England at the beginning of November. On 10 October 1361 the prince, now in his 31st year, married his cousin Joan, countess of Kent, daughter of Edmund of Woodstock, Earl of Kent, younger son of Edward I, and