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.
History of Hertfordshire
Hertford Castle was used as a gaol for a series of important captives during the Hundred Years' War. This was actually a series of separate wars that lasted a total of 116 years, between 1337 and 1453. The Plantagenet Kings of England fought the Valois Kings of France, almost entirely on French soil. Queen Isabella was imprisoned by her son, the King, in Hertford Castle in 1330, as were King David II of Scotland and his queen in 1346, after the Battle of Neville's Cross. King John II of France was imprisoned there in 1359 in considerable luxury.