The Battle of Agincourt
Henry V, the Longbow, and the Hundred Years' War (1415)
Your teacher assigned a unit on medieval warfare, your AP European History exam has a free-response question on the Hundred Years' War, or you just watched the Netflix adaptation and want to know what actually happened at Agincourt. Either way, you need the real story — fast.
This TLDR study guide covers everything a student needs to understand the Battle of Agincourt and why it still matters. You'll get a clear account of the Hundred Years' War and why Henry V invaded France in 1415, a campaign narrative from Southampton Harbor to the siege of Harfleur, and a step-by-step breakdown of what happened on that narrow, muddy field on October 25. The guide explains how the English longbow worked, why French plate armor became a liability in churned-up soil, and how a small, dysentery-weakened army routed the flower of French chivalry. It also tackles the hard question students often skip: Henry's order to kill thousands of French prisoners, and how historians disagree about whether it was a war crime or a military necessity.
The final section follows the battle's aftermath — the Treaty of Troyes, Henry's early death, and how Shakespeare turned a messy medieval campaign into a legend of English nationhood.
Written for high school and early-college students, this primer is built for a Hundred Years' War explained clearly and concisely — no padding, no jargon without definitions, just the history you need. If you're prepping for an AP European history medieval England exam or writing a paper on the battle, this is the place to start.
Grab your copy and walk into class knowing exactly what happened — and why historians are still arguing about it.
- Place Agincourt within the Hundred Years' War and explain why Henry V invaded France in 1415
- Describe the Harfleur siege and the grueling march that left Henry's army outnumbered at Agincourt
- Explain how terrain, weather, and the English longbow combined to defeat a larger French force
- Evaluate the controversy over Henry's order to kill French prisoners
- Assess the political and cultural legacy of the battle, including Shakespeare's role in shaping its memory
- 1. Setting the Stage: The Hundred Years' War and Henry VOrients the reader on the long Anglo-French conflict and explains why a young English king launched a fresh invasion in 1415.
- 2. The 1415 Campaign: From Southampton to HarfleurFollows Henry's invasion fleet, the costly siege of Harfleur, and the decision to march overland to Calais.
- 3. October 25, 1415: The Battle on the Muddy FieldA blow-by-blow account of the battle, from the dawn deployment to the French collapse.
- 4. The Longbow, Armor, and Why the English WonExplains the weapons, tactics, and terrain factors that let a smaller, sicker army destroy France's mounted elite.
- 5. The Prisoner Order and the Question of AtrocityExamines Henry's controversial command to kill French prisoners and how historians judge it.
- 6. Aftermath and Legacy: From Treaty of Troyes to ShakespeareTraces what Agincourt actually changed politically and how it became a cultural myth.