The Rain of Ruin: How English Longbowmen Shattered French Chivalry at Agincourt

Introduction: The 300 Metres of Hell

Let’s set the scene. It is the morning of October 25, 1415—St. Crispin’s Day. The rain that has fallen relentlessly for days has finally stopped, but the ground has been transformed. What was once a ploughed field between the woods of Agincourt and Tramecourt is now a morass of sticky, clinging mud.

On one side stand perhaps 6,000 to 9,000 Englishmen—exhausted, hungry, and many suffering from dysentery after the siege of Harfleur . On the other side, blocking the road to Calais, are 12,000 to 25,000 Frenchmen. The cream of French nobility. Dukes, counts, barons. Men who have trained their entire lives for exactly this moment .

And between them lies a killing ground that will become legendary.

The English longbowmen—common farmers and yeomen for the most part—step forward. They pull arrows from the quivers at their belts. They draw strings that require the strength of 150 pounds to pull back. And then they loose.

A French chronicler of the time would write that the sky went dark. The air filled with a sound like a thousand angry hornets. And the first wave of French chivalry began to die .

This is the story of how a simple wooden bow—the “medieval machine gun”—rewrote the rules of warfare and humbled the most powerful military caste in Europe.

Part 1: The Weapon That Changed Everything

The Longbow vs. The Crossbow

To understand why Agincourt happened the way it did, you need to understand two very different weapons.

The French relied heavily on the crossbow. It was a sophisticated piece of technology—a bow mounted horizontally on a stock, with a winding mechanism to pull back the string. It was powerful, accurate, and could punch through armor. But it had a fatal flaw in 1415: speed.

A trained crossbowman could fire perhaps two bolts per minute. The winding mechanism was slow. And here is the critical detail that cost the French the battle: crossbow strings were made of hemp or sinew that absorbed moisture. After the night of rain, those strings had stretched and lost tension. The Genoese mercenaries serving the French were outranged and outshot .

The English longbow was a different beast entirely. Made from a single stave of yew wood—the darker heartwood on the inside (which resists compression) and the lighter sapwood on the outside (which resists stretching)—it was a natural composite bow, centuries before modern materials .

The Numbers That Matter:

Draw weight: 110 to 150 pounds. To put that in perspective, a modern Olympic recurve bow is around 40-50 pounds. A hunting compound bow is 60-70. Pulling a warbow requires the kind of back and shoulder muscles you only develop by training from childhood .
Rate of fire: 10 to 16 arrows per minute. A single archer could loose an arrow every four seconds .
Maximum range: Up to 400 metres. Effective killing range: 200-250 metres .
Kinetic energy: A 150-pound bow delivered around 100-120 joules of energy—roughly the same as being hit with a sledgehammer .

The “Bodkin” Arrowhead

The longbow’s secret weapon was the bodkin point—a long, narrow, four-sided spike of hardened steel. Unlike a broadhead (which cuts flesh), the bodkin was designed to punch through metal. Tests conducted by the Royal Armouries and the Ministry of Defence have confirmed that a 150-pound longbow firing a bodkin arrow could penetrate plate armor at 200 metres .

Here is the test result that matters: at 200 metres, the arrow went through the armor and inflicted lethal wounds.

The French knights believed themselves invincible inside their steel shells. They were wrong.

One Legend to Kill

You may have heard the story that English archers held up two fingers (the “V sign”) to taunt the French, who supposedly cut off those fingers from captured archers. It is a great story. It is also almost certainly false. There is no contemporary evidence for it, and the earliest references appear centuries later . The real insult was what those fingers did—not what they signified.

Part 2: The Three Battles—Crecy, Poitiers, Agincourt

The longbow did not win England’s victories alone. What won the battles was a tactical system perfected over nearly 70 years of the Hundred Years War.

Crecy (1346): The First Hammer

At Crecy, Edward III faced a French army perhaps four times the size of his own. He did something unprecedented: he ordered his knights to dismount and fight on foot, while his archers were placed on the flanks in a wedge-shaped formation. When the French cavalry charged across the muddy field (sound familiar?), they were channeled into killing zones. The Genoese crossbowmen in French service were sent forward without their protective pavaises (large wooden shields) and were cut to ribbons. The French knights, impatient and arrogant, then charged over their own crossbowmen. One chronicler recorded an arrow piercing a knight’s leg armor, his saddle, and deep into his horse .

The French lost between 10,000 and 15,000 men. The English lost perhaps 300.

The Lesson: Cavalry cannot charge uphill through mud into a prepared archer position.

Poitiers (1356): The Black Prince’s Masterpiece

At Poitiers, Edward the Black Prince used the same tactic but with a twist. He placed his archers in a V-shaped formation on both flanks, funneling the French into a killing zone where his dismounted men-at-arms could engage them hand-to-hand. The French attacked in four waves. The first—300 elite knights—was supposed to eliminate the archers. They didn’t make it. The Dauphin’s division (the future Charles V) advanced on foot, weighted down by armor, only to be shot to pieces and then counter-charged by a small cavalry force the Prince had hidden in the woods .

The French King John II was captured. The loss of their monarch cost France a staggering ransom and destabilized the kingdom for years.

The Lesson: Combined arms—archers on the flanks, men-at-arms in the center, cavalry in reserve—is devastating.

Agincourt (1415): The Perfection of the System

And then came Agincourt. The French had seen Crecy. They had seen Poitiers. They had still learned nothing.

Part 3: The Anatomy of a Disaster

The Night Before

The night of October 24 was miserable. Rain hammered down. The English had no tents, no shelter. Their bowstrings, however, were safe. Every archer had unstrung his bow and tucked the string under his helmet or inside his tunic to keep it dry . The French crossbowmen, by contrast, had no such option—their strings could not be easily removed.

The French spent the night gambling, drinking, and arguing over who would have the honor of charging first. They assumed the battle was already won. They outnumbered the English by at least two to one, perhaps four to one. They had artillery (useless in the mud), cavalry, and the finest armored knights in Europe .

Hubris is a hell of a drug.

The English Position

Henry V arrayed his army with textbook precision. He placed his 1,500 or so men-at-arms—dismounted knights in plate armor—in the center, perhaps four ranks deep. On each flank, he placed roughly 5,000 to 6,000 longbowmen in wedge-shaped formations, with the front ranks holding sharpened wooden stakes driven into the ground at an angle, pointing toward the enemy .

The sides of the field were bordered by dense woodland. The French could not go around. They had to come straight up the middle—through the mud, through the arrows, and into the stakes.

The French Plan

The French arrayed themselves in three massive lines. The first line, commanded by the Constable Charles d’Albret, consisted of perhaps 8,000 dismounted men-at-arms. The second line was another 6,000 or so, also dismounted. The third line was cavalry, meant to exploit the breakthrough. Small cavalry forces on the flanks were supposed to charge the English archers .

The plan was not stupid on paper. But paper does not account for mud, arrows, and panic.

The Killing Begins

For three hours after sunrise, nothing happened. The two armies stared at each other. Then Henry, realizing the French would not advance first, ordered his archers to step forward and loose .

The first volley arced high and fell like a steel rain. Bodkin points punched through helmets, shoulder plates, and visors. Men screamed. Horses, less protected, went down in scores, thrashing and shrieking in the mud.

The French cavalry on the flanks, impatient and undisciplined, charged. They ran directly into the stakes. Horses impaled themselves. Riders were thrown into the English lines, where archers finished them with mallets and swords. The remnants of the cavalry charge, panicked, wheeled around and rode through their own infantry, disordering the advance .

Then the first line of French men-at-arms began to march.

The Mud

Here is the detail that the movies always get wrong. These men were wearing 60 to 80 pounds of plate armor. The field had been ploughed before the battle, then soaked by days of rain. The cavalry charge had churned the surface into a porridge of mud and manure.

Every step was a battle. Men slipped. Men fell. Men who fell in that mud, weighed down by armor, could not get up. Some drowned in inches of mud and water. Others choked as their helmets filled with slurry .

And all the while, from 200 metres away, the arrows came.

The French archers—the Genoese crossbowmen—had been sent to the rear by the impatient French nobles who wanted glory for themselves. They never fired a shot in support .

The Reach

The French first line, reduced by arrows and exhausted by the march, finally closed with the English men-at-arms. For a moment, the line held. King Henry himself was nearly knocked down, fighting alongside his men .

Then the archers acted.

Longbowmen carried more than bows. They had swords, axes, and the maul—a heavy wooden mallet used to drive stakes. As the French formation became disordered, the archers dropped their bows and waded into the melee, attacking from the flanks and rear. Lightly armored and quick in the mud, they did what knights in heavy plate could not: they moved .

One chronicler recorded that the English “set about their foe with mallet and spike” . The French, packed too tightly to swing their weapons, were butchered where they stood.

The second line advanced—and met the same fate. The third line, seeing the carnage, broke and fled.

The Slaughter of the Prisoners

Here is the darkest moment of the battle. By late afternoon, the English had taken hundreds of French prisoners—noblemen worth fortunes in ransom. Then a rumor spread: the French third line was reforming for another attack. The baggage camp to the rear was under assault.

Henry gave an order that would stain his reputation: kill the prisoners.

His men-at-arms, thinking of the lost ransoms, refused. So the archers—who had no stake in noble ransom traditions—did the job. They drew their knives and killed perhaps 3,000 French noblemen where they knelt .

Part 4: The Aftermath—What the Numbers Tell Us

The final tally is staggering.

French losses: Approximately 6,000 to 8,000 killed, the vast majority being nobility. Among the dead: the Constable of France (the supreme military commander), 3 dukes, 5 counts, 90 barons, and over 1,500 knights. An additional 1,500 to 2,000 were taken prisoner, including the Duke of Orléans .

English losses: Around 100 to 400 killed. Thirteen men-at-arms (including the Duke of York, grandson of Edward III) and perhaps 100 archers .

The ratio is almost unbelievable. One Englishman dead for every forty or fifty Frenchmen.

Why Such a Massive Disparity?

The mud: The French could not maneuver, retreat, or even stand effectively.
The arrows: Continuous fire disrupted formations and killed horses, which then became obstacles.
The stakes: Cavalry could not close with the archers.
The terrain: The woods channeled the French into a narrow front, nullifying their numerical advantage.
French arrogance: They refused to use their crossbowmen effectively, insisted on charging uphill into a prepared position, and exhausted themselves before reaching the English line.

Part 5: The End of an Era—What Agincourt Meant

It is tempting to say that Agincourt ended the age of the mounted knight. That is not quite true. Knights continued to dominate European warfare for another century. But Agincourt changed how they fought.

The Longbow Revolution: After Agincourt, no European power could ignore the longbow. The English had shown that a common man with a stick could kill a nobleman in the finest armor ever made. That is a dangerous idea.

The Fall of the Crossbow: While the crossbow remained in use (it was eventually replaced by gunpowder), Agincourt demonstrated its vulnerability to weather and its slow rate of fire.

The Rise of “Combined Arms”: The English victory relied on the integration of archers, dismounted men-at-arms, and terrain. This coordination—rather than relying on a single “shock” arm—became the template for late medieval warfare.

The Hundred Years War Did Not End: Despite the crushing victory, the war dragged on for another 38 years. Henry V would die of dysentery in 1422, never to become King of France as the Treaty of Troyes promised. Joan of Arc would appear a few years later, and by 1453, the English had lost everything except Calais.