Chivalry and Betrayal: The Hundred Years' War
In 1435 Bedford died and sworn enemies Charles VII and Phillip, Duke of Burgundy joined forces to get the English out and with Henry VI reluctance to wage war and to maintain peace by marrying Margaret of Anjou. Charles had no intention of peace and used cannon and sieges to retake France and Normandy culminating in the defeat of the English at the Battle of Castillon in the last English territory of Gascony ending the hundred years war.
Hundred Years' War (1369–89)
In 1378 Charles V's support for the election of the Avignon Pope Clement VII started the Great Schism. This event split the Church for almost four decades and thwarted papal efforts to prevent or end the Hundred Years' War. The disputed papal succession resulted in several lines of popes competing for the support of national rulers, which exacerbated the political divisions of the war. Despite papal involvement in peace conferences throughout the 14th century, no settlement was ever reached, in part because the papacy was not influential enough to impose one.