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 Périgord and Comminges and other lords set on Sir Thomas Wake the high-steward of Rouergue, slew many of his men, and put him to flight. The prince sent for Chandos, who came to his help, and some fighting took place, though war was not yet declared. His health was now so feeble that he could not take part in active operations, for he was swollen with dropsy and could not ride. By 18 March 1367 more than nine hundred towns, castles, and other places signified in one way or another their adherence to the French cause. The Black Prince had