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.
Joan of Arc
The Hundred Years' War continued for twenty-two years after her death. Charles VII retained legitimacy as the king of France in spite of a rival coronation held for Henry VI at Notre-Dame cathedral in Paris on 16 December 1431, the boy's tenth birthday. Before England could rebuild its military leadership and force of longbowmen lost in 1429, the country lost its alliance with Burgundy when the Treaty of Arras was signed in 1435. The Duke of Bedford died the same year and Henry VI became the youngest king of England to rule without a regent. His weak leadership was probably the most important factor in ending the conflict. Kelly DeVries argues that Joan of Arc's aggressive use of artillery and frontal assaults influenced French tactics for the rest of the war.