The key outcome of the Battle of Agincourt, fought on October 25, 1415, during the Hundred Years' War, was a decisive victory for the English army, despite being heavily outnumbered by the French forces. Led by King Henry V, English longbowmen played a pivotal role in the battle, causing significant casualties among the French knights. This victory bolstered English morale and solidified Henry V’s reputation as a military leader. It also had long-term implications for the power dynamics in France, contributing to the ongoing conflict between England and France.