On 22 June 1340, Edward and his fleet sailed from England and the next day arrived off the Zwin estuary. The French fleet assumed a defensive formation off the port of Sluis. The English fleet deceived the French into believing they were withdrawing. When the wind turned in the late afternoon, the English attacked with the wind and sun behind them. The English fleet of 120–150 ships was led by Edward III of England and the 230-strong French fleet by the Breton knight Hugues Quiéret, Admiral of France, and Nicolas Béhuchet, Constable of France. The English were able to manoeuvre against the French and defeat them in detail, capturing most of their ships. The French lost 16,000–20,000 men. The battle gave the English fleet naval supremacy in the English Channel. However, they were unable to take strategic advantage of this, and their success barely interrupted French raids on English territories and shipping.