Battle at a village in northern France, near Calais, when Henry V of England won a great victory against the French on 25th October 1415. Henry had landed at the mouth of the Seine on 14th August, at the start of his campaign, and taken nearby Harflleur after a six-week siege; he then led a march toward Calais, also held by the English, over 150 miles to the north.

Some 5-6,000 English troops met a French force of 50-60,000 near Agincourt. In the battle that followed the French advance on the narrow English front met a hail of arrows. The English killed three French dukes, the constable of France, nine counts, 90 lords and some 5,000 lesser nobles; they lost one duke, one earl, six or seven knights and around 500 others. The highest-ranking English casualty, Edward, 2nd duke of York, suffocated in his armour.

Henry's victory consolidated little territory, but enhanced his prestige, decimated and demoralized the French ruling class and laid the basis for the Treaty of Troyers (1420) by which he became heir to the throne of France.