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 imposing this tax, had retired to his Norman estate. Charles took advantage of these appeals, and on 25 January 1369 sent messengers to the Black Prince, who was then residing at Bordeaux, summoning him to appear in person before him in Paris and there receive judgment. He replied: "We will willingly attend at Paris on the day appointed since the king of France sends for us, out it shall be with our helmet on our head and sixty thousand men in our company". The Black Prince caused the messengers to be imprisoned, and in revenge for this the Counts of