Hundred Years' War (1415–53)
By 1449, the French had retaken Rouen. In 1450 the Count of Clermont and Arthur de Richemont, Earl of Richmond, of the Montfort family (the future Arthur III, Duke of Brittany) caught an English army attempting to relieve Caen at the Battle of Formigny and defeated it. The English army was attacked from the flank and rear by Richemont's force just as they were on the verge of beating Clermont's army. The French proceeded to capture Caen on July 6 and Bordeaux and Bayonne in 1451. The attempt by Talbot to retake Guyenne, though initially welcomed by the locals, was crushed by Jean Bureau and his cannons at the Battle of Castillon in 1453 where Talbot had led a small Anglo-Gascon force in a frontal attack on an entrenched camp. This is considered the last battle of the Hundred Years' War.
Dual monarchy of England and France
The English and French had been constantly at war over hereditary sovereignty in France; the Hundred Years' War (1337–1453) escalated, and the conflict between the two nations reached its peak in an intermittent series of belligerent phases, with each phase usually ending with a temporary truce lasting for a few years. In the first phase Edward III won some extraordinary victories against the French, most notably at Crécy and Sluys. His son Edward, the Black Prince also captured the French king John II at the battle of Poitiers in 1356, and routed the French army. The year 1360 marked the end of the first phase and an opportunity for peace.