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 Edward appears to have advanced at the head of the reserve, and the rout soon became complete. When Edward met his son after the battle was over, he embraced him and declared that he had acquitted himself loyally, and the prince bowed low and did reverence to his father. The next day he joined the king in paying funeral honours to King John of Bohemia. The prince was present at the Siege of Calais (1346–1347), and after the surrender of the town harried and burned the country for around, and brought much booty back with him. He returned to England