The siege of Calais (4 September 1346 – 3 August 1347) marked the conclusion of the Crécy campaign, during the Edwardian phase of the Hundred Years' War. On 26 August 1346, an English army under King Edward III (effigy pictured) inflicted a heavy defeat on a large French army led by King Philip VI at the Battle of Crécy. A week later they invested the well-fortified port of Calais, which had a strong garrison under the command of Jean de Vienne. Edward made several unsuccessful attempts to breach the walls or to take the town by assault. During the winter and spring the French were able to run in supplies and reinforcements by sea, but in late April the English established a fortification which enabled them to command the entrance to the harbour and cut off the further flow of supplies. On 3 August Calais capitulated. The town provided the English with an important strategic lodgement, and was not recaptured by the French until 1558. (This article is part of a featured topic: Hundred Years' War, 1345–1347.)