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 were traitors. On the morning of the 3 April the prince's army marched from Navarrete, and all dismounted while they were yet some distance from Henry's army. The vanguard, in which were three thousand men-at-arms, both English and Bretons, was led by Lancaster, Chandos, Calveley, and Clisson; the right division was commanded by Armagnac and other Gascon lords; the left, in which some German mercenaries marched with the Gascons, by the Jean, Captal de Buch and the Count of Foix; and the rear or main battle by the prince, with three thousand lances, and with the prince was Peter and,