Which battle of the Hundred Years' War took place on October 25, 1415?

The Battle of Agincourt was a battle of the Hundred Years' War that resulted in an English victory.The battle took place on 25 October 1415 (Saint Crispin's Day) in the County of Saint-Pol, Artois, some 40 km south of Calais. It was one of the most important English triumphs in the conflict, along with the battles of Crécy (1346) and Poitiers (1356). England's victory at Agincourt against a numerically superior French army crippled France, and started a new period in the war, which was dominated by English military successes.

After several decades of relative peace, the English had renewed their war effort in 1415 amid the failure of negotiations with the French. In the ensuing campaign, many soldiers perished due to disease and the English numbers dwindled, but as they tried to withdraw to English-held Calais they found their path blocked by a considerably larger French army. Despite the disadvantage, the following battle ended in an overwhelming tactical victory for the English.

This battle is notable for the use of the English longbow in very large numbers, with the English and Welsh archers forming up to 80 percent of Henry's army. The battle is the centerpiece of the play Henry V by William Shakespeare.