query: When did the Hundred Years' War end?
passage: Hundred Years' War
The Hundred Years' War was a series of conflicts waged from 1337 to 1453 by the House of Plantagenet, rulers of the Kingdom of England, against the French House of Valois, over the right to rule the Kingdom of France. Each side drew many allies into the war. It was one of the most notable conflicts of the Middle Ages, in which five generations of kings from two rival dynasties fought for the throne of the largest kingdom in Western Europe. The war marked both the height of chivalry and its subsequent decline, and the development of strong national identities in both countries.
passage: 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.[95]