Edward the Black Prince the party of Montfort, and Chandos won the Battle of Auray (29 September 1364) against the French. As the leaders of the free companies which desolated France were for the most part Englishmen or Gascons, they did not ravage Aquitaine, and the prince was suspected, probably not without cause, of encouraging, or at least of taking no pains to discourage, their proceedings. Accordingly on 14 November 1364 Edward III called upon him to restrain their ravages. In 1365 the free companies, under Sir Hugh Calveley and other leaders, took service with Bertrand du Guesclin, who employed them in 1366 in
Edward the Black Prince French, who were utterly defeated, left eleven thousand dead on the field, of whom 2,426 were men of gentle birth. Nearly a hundred counts, barons, and bannerets and two thousand men-at-arms, besides many others, were made prisoners, and the king and his youngest son, Philip were among those who were taken. The English losses were not large. When King John II was brought to him, the prince received him with respect, helped him to take off his armour, and entertained him and the greater part of the princes and barons who had been made prisoners at supper. He served at