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 been one of the prince's trusted friends. When the Black Prince heard of the surrender of Limoges to the French, he swore "by the soul of his father" that he would have the place again and would make the inhabitants pay dearly for their treachery. He set out from Cognac with an army of about 4,000 men. Due to his sickness he was unable to mount his horse, and was carried in a litter. During the siege of Limoges, the prince was determined to take the town and ordered the undermining of its walls. On 19 September, his miners succeeded