The Battle of Agincourt, fought on October 25, 1415, during the Hundred Years' War, was significant for several reasons. It showcased the effectiveness of English longbowmen against heavily armored French knights, despite the English being vastly outnumbered. The victory bolstered English morale and demonstrated King Henry V's leadership. It shifted the tide of the war, with England claiming significant territory in France and solidifying Henry V's reputation as a formidable king. Furthermore, it increased support for the English cause and highlighted the changing nature of warfare in medieval Europe, emphasizing ranged combat over traditional cavalry charges.