The English seized and held the advantage. Normandy called off the siege of Aiguillon and retreated northward, while Sir Thomas Dagworth captured Charles of Blois in Brittany. The English army pulled back from Crécy to mount the siege of Calais; the town held out stubbornly, but the English were determined, and they easily supplied across the English Channel. Philip led out a relieving army in July 1347, but unlike the Siege of Tournai, it was now Edward who had the upper hand. With the plunder of his Norman expedition and the reforms he had executed in his tax system, he could hold to his siege lines and await an attack that Philip dared not deliver. It was Philip who marched away in August, and the city capitulated shortly thereafter.