Hundred Years War, England, France, Longbow

The Battle of Agincourt was fought on 25 October 1415 during the Hundred Years War. It became the signature victory of Henry V and one of the most famous examples of a smaller army defeating a larger opponent under favorable conditions.

Henry's campaign had already been taxing. After the siege of Harfleur, disease and attrition weakened his army, and the English were trying to reach safety at Calais while shadowed by a larger French force.

The battlefield favored defense. Rain and churned ground created mud that restricted movement, while the narrow front limited the French advantage in numbers.

The English army relied heavily on longbowmen supported by men-at-arms. Stakes and disciplined deployment allowed the archers to protect themselves and create killing zones in front of the line.

The French plan depended on armored men-at-arms pressing home an attack and crushing the exhausted English. But dense formations advancing through mud lost order, speed, and breath before reaching effective striking distance.

Arrow fire added to the confusion even where armor reduced lethal penetration. Horses panicked, fallen men obstructed those behind them, and the crowded field turned the French assault into a struggle simply to move forward.

When the melee began, the English faced opponents already disordered and exhausted. Henry's line held, and archers joined close combat where needed, helping transform the French attack into a rout.

The casualty imbalance was extraordinary, especially among the French nobility. Agincourt thus became not only a military victory but a political and social shock for France.

The battle did not win the Hundred Years War by itself, but it strengthened Henry's bargaining position and prestige, eventually contributing to the Treaty of Troyes. It also reinforced the English military reputation built around disciplined archery and defensive tactics.

Agincourt endures because it illustrates how terrain, formation density, fatigue, and command choices can negate numerical superiority. It is a reminder that medieval warfare was often decided by preparation and conditions rather than heroic charge alone.

Sources

• Barker, Juliet. Agincourt. Little, Brown, 2005.
• Curry, Anne. Agincourt: A New History. Tempus, 2005.
• Keegan, John. The Face of Battle. Penguin, 1976.
• Sumption, Jonathan. The Hundred Years War, Volume IV: Cursed Kings. University of Pennsylvania Press, 2015.