Edward the Black Prince compelling Peter of Castile to flee from his kingdom, and in setting up his bastard brother, Henry of Trastámara, as king in his stead. Peter, who was in alliance with Edward III, sent messengers to the Black Prince asking his help, and on receiving a gracious answer at Corunna, set out at once, and arrived at Bayonne with his son and his three daughters. The prince met him at Capbreton, and rode with him to Bordeaux. Many of the prince's lords, both English and Gascon, were unwilling that he should espouse Peter's cause, but he declared that it was not
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