The Hundred Years' War was a series of conflicts fought between England and France from 1337 to 1453. The war was primarily over territorial disputes and claims to the French throne. It included famous battles such as Crecy and Agincourt, where the English longbowmen played a significant role in their victories. The war saw the rise of national identities in both countries and significant changes in military tactics. It ended with the French reclaiming most of their territory, leading to the decline of English territorial ambitions in France. The conflict also set the stage for future political developments in both nations.