The Hundred Years' War, spanning from 1337 to 1453, was a prolonged conflict between England and France. This century-long struggle began with Edward III's claim to the French throne and saw major battles like Crécy and Agincourt, showcasing the power of the English longbow. The war transformed medieval warfare, introducing new tactics and weapons. It also shaped national identities, accelerated political centralization, and had lasting economic impacts on both kingdoms. Key figures like Henry V and Joan of Arc emerged as national heroes during this tumultuous period.