House of Valois the senior descendant of Philip IV of France. Charles' character eventually alienated both the French and English monarchs, because he readily switched sides whenever it suited his interest. In 1356, Edward, the Black Prince, eldest son and heir of Edward III, led an army to a chevauchée in France. John pursued the Black Prince, who tried to avoid battling the French king's superior force. Negotiations broke down. In the Battle of Poitiers, the French suffered another humiliating defeat, and their king was captured. Edward hoped to capitalize on the victory by invading France and having himself crowned at Reims. But
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