The immediate cause of the battle was an attempt by French and Scottish forces, led by Charles of Bourbon and Sir John Stewart of Darnley, to intercept a supply convoy headed for the English army at Orléans. The English had been laying siege to the city since the previous October. This supply convoy was escorted by an English force under Sir John Fastolf and had been outfitted in Paris, whence it had departed some time earlier. The battle was decisively won by the English.