Which weapon brought significant changes to warfare during the hundred years war?

The longbow brought significant changes to warfare during the Hundred Years War. Its ability to penetrate armor and fire accurately over long distances made it a powerful and influential weapon on the battlefield. The English longbowmen played a crucial role in several key battles during the Hundred Years War, such as the Battles of Crecy, Poitiers, and Agincourt, where their skilled use of the longbow helped secure English victories against larger French forces. The longbow's impact on warfare during this time period was so significant that it influenced military tactics and strategies for years to come.