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
The root causes of the conflict can be found in the demographic, economic and political crises of 14th century Europe. The outbreak of war was motivated by a gradual rise in tension between the kings of France and England about Gascony, Flanders and Scotland. The dynastic question, which arose due to an interruption of the direct male line of the Capetians, was the official pretext.