Battle of Somosierra

• 1. Introduction

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  On the 30th of November 1808, at a mountain pass 60 miles north of Madrid, a Polish cavalry officer named Jan Kozietulski called out to his men in French: "En avant, Vive l'Empereur!" Then 125 horsemen rode straight into the mouths of sixteen Spanish cannon.

  The Battle of Somosierra sits at a strange junction of military history. It was a moment where an order may have been misunderstood, where the fog of battle obscured who actually led the charge, and where popular legend competed fiercely with documented fact for decades afterward. What is certain is this: a small force of Polish Chevaux-Legers punched through a defended mountain pass and opened the road to Madrid for Napoleon Bonaparte.

  What drove Napoleon to send cavalry against fortified artillery batteries? Who really led the charge up that slope? And what happened to the Spanish general who tried to stop him? Those questions run through everything that follows.

• 2. Spain in Collapse

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  The French invasion of Spain had started with the Battle of Zornoza, and by late November 1808, the Grande Armee had overwhelmed and destroyed both wings of the Spanish popular army. Napoleon himself advanced on Madrid with 40,000 men.

  General Benito de San Juan faced an impossible task. He gathered an ad hoc force of militia, reservists, and battered regular regiments, assembling roughly 12,000 men to shield the capital. The terrain around Madrid offered multiple routes of approach, so San Juan was forced to disperse his already outnumbered force across several passes. He sent 9,000 men west to guard the Guadarrama Pass and posted 3,000 at Sepulveda as an advanced screen. That left only 9,000 men and 16 guns to hold the heights of Somosierra itself.

  Two days before the main battle, the situation at Sepulveda already showed how thin the Spanish margin was. On the evening of the 28th of November, the brigade there, which included the 3rd Battalion of the Walloon Guards, the Jaen and Irlanda Regiments, and the 1st Battalion of the Seville Volunteers, managed to repulse a French attack by two Fusilier Regiments of the Middle Guard under General Anne Jean Marie Rene Savary. But when the Spanish cavalry was beaten by the brigade of General Antoine Charles Louis de Lasalle, the Spanish infantry was forced back in the growing darkness. The pass at Somosierra would now have to hold alone.

• 3. The Charge and Its Confusion

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  Napoleon's infantry advanced toward the pass on the morning of the 30th of November, exchanging musket fire with the defenders and making slow but measurable progress. The terrain made outflanking the Spanish positions difficult for foot soldiers, and Napoleon grew impatient.

  His solution was audacious to the point of recklessness. He ordered his Polish Chevaux-Legers escort squadron, numbering 125 men, to charge directly at the Spanish artillery batteries. Some historians have argued that Napoleon had ordered only the closest battery to be taken, to open a gap for his infantry, and that Kozietulski misunderstood the command. Others read it as a deliberate order to take the entire position. Because Napoleon issued no written orders, the question has never been fully resolved.

  Once the charge began, the question became moot. As the horses accelerated and came under fire from the second battery, there was no way to stop or turn back. The Chevaux-Legers took the second and third batteries, though only a handful reached the fourth. Kozietulski lost his horse after the first battery fell. Lieutenant Andrzej Niegolewski, returning from reconnaissance with his own soldiers, joined the charge and eventually led the final push to the last battery. He survived despite receiving nine wounds from bayonets and two carbine shots to the head. When the fourth battery was finally taken, Napoleon committed the Chasseurs of the Guard and the 1st Squadron of Poles under Tomasz Lubienski to secure the pass.

• 4. Who Led the Charge

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  The question of credit for the charge at Somosierra generated controversy that outlasted the veterans who fought it. The 13th Bulletin of the Army of Spain credited General Louis Pierre, Count Montbrun, with commanding the Chevaux-Legers. French historian Adolphe Thiers repeated that attribution, giving Montbrun the honor of leading the assault.

  Both Polish participants and Lieutenant Colonel Pierre Dautancourt, one of the French tutors of the unit, flatly contradicted this. Dautancourt noted that Montbrun himself, in private conversation, had laughed at the idea that he led the charge. Major Philippe de Segur claimed in his memoirs to have commanded it himself, but his accounts were widely regarded as unreliable, and both Dautancourt and the Polish sources denied his role as well.

  Even among the Polish officers, the crediting of heroism became its own small contest. Tomasz Lubienski, who led the follow-up with the 1st Squadron, tried to minimize the role of the 3rd Squadron that had broken the batteries in the first place. Niegolewski responded by arguing that his men had done the hard work, leaving Lubienski to ride in while the Spanish, in his memorable phrase, were shooting at him "with candies." The legend of the battle cry also split along national lines. Official records show Kozietulski calling "En avant, Vive l'Empereur"; popular legend holds that the true cry was the Polish "Naprzód psiekrwie, Cesarz patrzy" -- Forward dammit, the Emperor is watching.

• 5. The Spanish Side

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  San Juan's 16 cannon were arranged in four batteries along the pass, not all clustered at the peak as some French officer accounts later claimed. The placement matters. Cannon of that era had an effective range of 600-800 metres, and had all the guns been massed at the summit they could not have struck much of the French army approaching from below. Reports even placed Napoleon himself under artillery fire at various points in the engagement, which is consistent with a dispersed battery layout.

  The Spanish artillerymen at their positions preferred death to abandonment of their guns. That resolve was not in doubt. But the militia supporting them made a different calculation. When they watched the small group of Polish horsemen appear to take the artillery positions with apparent ease, they broke and withdrew. What the militiamen could not see through the smoke was how few Poles had actually made it to the top of the pass. The retreat of the militia pulled the rest of the Spanish army with it.

  In the days that followed, French patrols reached the outskirts of Madrid on the 1st of December. The Junta mounted a half-hearted defence of the capital, and on the 4th of December a French artillery barrage ended it. The remaining 2,500 Spanish regulars surrendered; 20,000 civilians who had gathered under the Spanish banner dispersed into the city; and the French entered Madrid for the second time that year.

• 6. Legacy and Memory

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  Although infantry bore the heavier burden of fighting at Somosierra, later accounts stripped that context away. Napoleon's own retelling placed all the emphasis on the Polish cavalry charge, and that framing took hold. The battle became a symbol of Polish military devotion to the Napoleonic cause.

  In Warsaw, the battle's date is carved into the Tomb of the Unknown Soldier: "SOMOSIERRA 30 XI 1808." It is one of the inscriptions chosen to represent the full span of Polish military memory.

  The man who tried to stop Napoleon at the pass did not survive the war in any ordinary sense. Benito de San Juan, who had assembled and deployed his improvised force across three mountain positions, was killed not by the French but by his own men after the defeat. The next battle Napoleon commanded personally was at Teugen-Hausen, on the 19th of April 1809, months after the road to Madrid had been opened by a cavalry charge that even its own commanders could not fully agree on how to describe.