The Battle of Agincourt took place on October 25, 1415, during the Hundred Years' War between England and France. The English army, led by King Henry V, faced a much larger French force. Despite being outnumbered, the English used longbows effectively, which played a crucial role in their victory. The battle is famous for the significant defeat of the French knights, who were heavily armored and struggled in the muddy terrain. The English victory at Agincourt boosted national pride and solidified Henry V's reputation as a strong leader, influencing the course of the war.