The Napoleonic Wars produced battles on a scale Europe had rarely experienced. Armies containing tens or even hundreds of thousands of men crossed the continent, while fleets fought for control of seas stretching from the Atlantic to the Mediterranean.
Yet size alone does not make a battle important.
Some enormous encounters changed surprisingly little. Others, fought by smaller forces, destroyed coalitions, toppled governments or altered Napoleon Bonaparte’s career. Ranking them therefore requires more than counting soldiers.
This list considers four things:
- Scale, including the number of troops or ships engaged
- Casualties and destruction
- Strategic consequences
- Political importance to the Napoleonic Wars
Troop and casualty figures vary considerably between historians. Napoleonic armies were exceptionally good at producing paperwork, but unfortunately not always paperwork historians can agree upon.
20. Battle of Lützen, 2 May 1813
War: War of the Sixth Coalition
Commanders: Napoleon Bonaparte against Peter Wittgenstein and Gebhard von Blücher
Forces: Around 110,000 French against approximately 70,000 Coalition troops
Result: French victory
After the Russian catastrophe, many European leaders hoped Napoleon’s military power had been permanently broken.
Lützen suggested otherwise.
The Coalition attempted to strike Napoleon’s dispersed army, but French resistance around a series of villages gave him time to concentrate his forces.
Napoleon eventually forced the Allies to withdraw.
The weakness was cavalry. Thousands of horses had been lost in Russia, leaving Napoleon unable to pursue effectively.
He could still win battles. Destroying defeated armies had become considerably harder.
Why it mattered: Lützen restored French
19. Battle of La Rothière, 1 February 1814
War: War of the Sixth Coalition
Commanders: Napoleon Bonaparte against Gebhard von Blücher and Coalition commanders
Forces: Roughly 40,000 to 45,000 French against around 80,000 Coalition troops
Result: Coalition victory
By early 1814, the war had reached French soil.
At La Rothière, Napoleon faced a substantially larger Coalition army commanded principally by Blücher. Fighting took place in miserable winter conditions as Allied forces attacked French positions around the village.
Napoleon eventually withdrew.
La Rothière was not the end. In fact, Napoleon responded with one of the most impressive sequences of his career during the Six Days’ Campaign. But the strategic reality was increasingly obvious. France itself was now the battlefield.
Why it mattered: It demonstrated how far Napoleon’s position had deteriorated after Leipzig and the loss of Germany.
18. Battle of Maloyaroslavets, 24 October 1812
War: French invasion of Russia
Commanders: Eugène de Beauharnais and Napoleon Bonaparte against Dmitry Dokhturov and Mikhail Kutuzov
Forces engaged: Roughly 20,000 to 25,000 on each side during the principal fighting
Result: Tactical French success, strategic Russian success
Maloyaroslavets is easily overshadowed by Borodino and the burning of Moscow, yet I would argue it deserves far more attention.
Napoleon wanted to retreat from Moscow through the comparatively untouched countryside around Kaluga, where his army might find food and forage. Russian troops blocked the route.
The French eventually controlled the battlefield, but Napoleon decided against continuing south. Instead, the Grande Armée returned to the devastated Smolensk road.
That distinction between tactical victory and strategic defeat is important. Napoleon won possession of the ground and then went precisely where his enemy wanted him to go.
Why it mattered: The battle helped determine the route of Napoleon’s catastrophic retreat from Russia.
17. Battle of Eylau, 7 to 8 February 1807
War: War of the Fourth Coalition
Commanders: Napoleon Bonaparte against Levin August von Bennigsen
Forces: Around 70,000 to 75,000 French and allied troops against approximately 65,000 to 75,000 Russians and Prussians
Result: Inconclusive
Eylau stripped away some of the glamour surrounding Napoleon’s earlier victories.
Fought amid snowstorms in East Prussia, it became an appalling contest of artillery, infantry assaults and cavalry charges. Marshal Murat’s enormous cavalry attack helped stabilise the French position after the Russian army threatened Napoleon’s centre.
Neither army achieved the destruction of the other.
The psychological importance was considerable. After Ulm, Austerlitz and Jena, Napoleon had acquired an aura of almost effortless battlefield superiority. At Eylau, the Grande Armée bled heavily and achieved very little.
Why it mattered: Eylau demonstrated that Napoleon’s army could be fought to a standstill.
16. Battle of Bautzen, 20 to 21 May 1813
War: War of the Sixth Coalition
Commanders: Napoleon Bonaparte against Peter Wittgenstein and Gebhard von Blücher
Forces: Roughly 115,000 French against around 95,000 Coalition troops
Result: French victory
Bautzen showed that Napoleon remained extraordinarily dangerous after the destruction of the Grande Armée in Russia.
The French attacked the Russo-Prussian army around Bautzen while Marshal Ney attempted to strike its flank and rear.
Napoleon won, but the result was less decisive than he wanted. Ney’s movements failed to seal the Allied escape route, while the shortage of experienced French cavalry again limited pursuit.
This was becoming a recurring problem in 1813. Napoleon could still win the battlefield without gaining the strategic destruction that had characterised his earlier campaigns.
Why it mattered: Bautzen confirmed Napoleon’s tactical recovery after Russia while exposing the limitations of his rebuilt army.
15. Battle of Aspern-Essling, 21 to 22 May 1809
War: War of the Fifth Coalition
Commanders: Napoleon Bonaparte against Archduke Charles
Forces: Roughly 75,000 French against approximately 90,000 Austrians
Result: Austrian victory
Napoleon crossed the Danube near Vienna and discovered that rivers are rather inconvenient things when the enemy is actively attempting to destroy your bridges.
Archduke Charles attacked the French bridgehead around Aspern and Essling. Repeated disruption of Napoleon’s crossings prevented him from reinforcing his army effectively.
The fighting was savage. Marshal Jean Lannes, one of Napoleon’s finest commanders and closest companions, was mortally wounded.
Eventually Napoleon withdrew to Lobau Island.
This was his first major defeat in a large pitched battle as emperor.
Why it mattered: Aspern-Essling proved that Napoleon could be beaten by a major continental army.
14. Battle of Salamanca, 22 July 1812
War: Peninsular War
Commanders: Arthur Wellesley against Marshal Auguste de Marmont
Forces: Around 48,000 Allied troops against approximately 50,000 French
Result: Decisive Allied victory
Salamanca deserves a place because it destroyed the idea that Wellington was primarily a defensive commander.
Marmont extended the French army while attempting to manoeuvre around Wellington’s flank. Wellington recognised the mistake almost immediately and attacked.
The French left was overwhelmed before the army could properly reorganise.
The battle opened the road to Madrid and badly damaged French control of Spain.
There is something particularly satisfying about Salamanca from a historian’s perspective. A campaign of patient manoeuvre suddenly became brutally decisive because one commander spotted a fleeting opportunity before his opponent realised he had created it.
Why it mattered: Salamanca transformed the strategic situation in Spain and demonstrated Wellington’s ability to conduct aggressive battlefield operations.
13. Battle of Vitoria, 21 June 1813
War: Peninsular War
Commanders: Wellington against Joseph Bonaparte and Marshal Jourdan
Forces: Around 80,000 Allied troops against roughly 65,000 French
Result: Decisive Allied victory
Vitoria effectively broke French power in Spain.
Wellington attacked Joseph Bonaparte’s army from several directions, threatening its communications and forcing a general retreat.
The French abandoned artillery, supplies, baggage and a remarkable quantity of loot accumulated during the occupation of Spain.
Allied troops subsequently discovered the treasure.
Military discipline suffered accordingly.
Wellington was furious, complaining that his army had become:
“The scum of the earth.”
Not perhaps the motivational quotation modern regimental recruiting offices would choose.
Why it mattered: Vitoria forced the French towards the Pyrenees and brought the Peninsular War into its final phase.
12. Battle of Dresden, 26 to 27 August 1813
War: War of the Sixth Coalition
Commanders: Napoleon Bonaparte against Prince Schwarzenberg
Forces: Approximately 120,000 French against around 150,000 to 200,000 Coalition troops
Result: French victory
Dresden was Napoleon’s last great battlefield victory.
The Coalition attempted to overwhelm Dresden before Napoleon could concentrate his army. He arrived rapidly, reinforced the defenders and counter-attacked.
Heavy rain complicated the battle, particularly for infantry relying on flintlock muskets. French cavalry exploited the conditions with considerable effect.
The Coalition army withdrew after suffering heavy losses.
Yet Dresden reveals Napoleon’s growing strategic problem. Winning a battle was no longer enough. Coalition armies were learning to avoid decisive confrontations with Napoleon himself while attacking his marshals elsewhere.
Why it mattered: It showed that Napoleon remained tactically formidable even while his strategic position deteriorated.
11. Battle of Marengo, 14 June 1800
War: War of the Second Coalition
Commanders: Napoleon Bonaparte against Michael von Melas
Forces: Around 28,000 French against approximately 30,000 Austrians
Result: French victory
Strictly speaking, Marengo belongs to the French Revolutionary Wars rather than the Napoleonic Wars proper. It remains essential to understanding Napoleon’s rise, so it earns its place as a precursor.
For much of the day, Napoleon appeared to be losing.
The Austrians pushed the French backwards, and Melas believed victory sufficiently secure that he delegated the final pursuit.
Then General Louis Desaix arrived with reinforcements.
A French counter-attack, supported by François Étienne de Kellermann’s cavalry, transformed impending defeat into victory.
Desaix was killed.
Why it mattered: Marengo strengthened Napoleon’s position as First Consul and restored French dominance in northern Italy.
10. Battle of the Pyramids, 21 July 1798
War: French campaign in Egypt
Commanders: Napoleon Bonaparte against Murad Bey and Ibrahim Bey
Forces: Around 20,000 to 25,000 French against a large Mamluk and Egyptian force
Result: Decisive French victory
Another Revolutionary Wars precursor, but an important one.
Napoleon organised his divisions into large defensive formations capable of resisting the formidable Mamluk cavalry. French musketry and artillery inflicted severe losses while maintaining disciplined cohesion.
The victory opened Cairo to the French.
Napoleon supposedly told his soldiers:
“From the heights of these pyramids, forty centuries look down upon you.”
The precise wording is debated, as so often with Napoleonic quotations, but the sentiment fitted Napoleon perfectly. He understood theatre almost as well as artillery.
Why it mattered: The battle established French control over Lower Egypt and enhanced Napoleon’s reputation, although Nelson was shortly to make the expedition
9. Battle of Friedland, 14 June 1807
War: War of the Fourth Coalition
Commanders: Napoleon Bonaparte against Levin August von Bennigsen
Forces: Around 80,000 French against approximately 60,000 Russians
Result: Decisive French victory
Friedland was Napoleon at his most dangerous.
Bennigsen concentrated much of the Russian army with the River Alle behind him. Napoleon recognised the opportunity and steadily assembled overwhelming strength.
The French attack compressed the Russians against the river. Artillery played a particularly destructive role as Russian formations became crowded around the crossings.
The Russian army escaped, but badly mauled.
Why it mattered: Friedland led directly towards the Treaties of Tilsit and the temporary Franco-Russian accommodation that placed Napoleon near the height of his European power.
8. Battle of Wagram, 5 to 6 July 1809
War: War of the Fifth Coalition
Commanders: Napoleon Bonaparte against Archduke Charles
Forces: Around 150,000 to 170,000 French and allied troops against roughly 130,000 to 145,000 Austrians
Result: French victory
Wagram was enormous, violent and rather less elegant than Napoleon’s earlier masterpieces.
Following the setback at Aspern-Essling, Napoleon crossed the Danube again with a much larger force.
The resulting battle involved enormous concentrations of artillery and infantry. Napoleon’s famous grand battery helped batter the Austrian centre before MacDonald’s formation advanced into the fighting.
French losses were severe, but Archduke Charles eventually ordered a retreat.
Why it mattered: Wagram ended Austria’s attempt to break French dominance in 1809 and led to the Treaty of Schönbrunn.
7. Battle of Trafalgar, 21 October 1805
War: War of the Third Coalition
Commanders: Horatio Nelson against Pierre-Charles Villeneuve
Forces: 27 British ships of the line against 33 Franco-Spanish ships of the line
Result: Decisive British victory
Trafalgar was fought at sea, but leaving it out of any ranking of the most consequential Napoleonic battles would be indefensible.
Nelson abandoned conventional parallel battle lines and attacked the Franco-Spanish fleet in columns, intending to break through its formation and create a confused close-range action.
It worked spectacularly.
Before battle, Nelson sent his famous signal:
“England expects that every man will do his duty.”
The British captured or destroyed much of the opposing fleet without losing a ship in battle, although Nelson himself was mortally wounded.
Why it mattered: Trafalgar confirmed British command of the sea and ensured Napoleon could not challenge Britain through conventional naval power.
6. Battle of Jena-Auerstedt, 14 October 1806
War: War of the Fourth Coalition
Commanders: Napoleon Bonaparte and Marshal Louis-Nicolas Davout against the Prussian high command
Forces: More than 150,000 troops involved across the twin battles
Result: Decisive French victory
Jena-Auerstedt is really two battles whose stories became inseparable.
Napoleon defeated a substantial Prussian force at Jena. Meanwhile Davout’s III Corps encountered the main Prussian army near Auerstedt.
Davout was heavily outnumbered.
He won anyway.
The twin defeats shattered the Prussian army. French troops entered Berlin less than two weeks later.
Prussia’s military reputation, built under Frederick the Great, collapsed with remarkable speed.
Why it mattered: The campaign destroyed Prussia’s existing military system and helped provoke the sweeping reforms that eventually produced a much stronger Prussian state.
5. Battle of Borodino, 7 September 1812
War: French invasion of Russia
Commanders: Napoleon Bonaparte against Mikhail Kutuzov
Forces: Roughly 130,000 French and allied troops against approximately 120,000 to 135,000 Russians
Result: French tactical victory
Borodino was slaughter on an extraordinary scale.
The Russians constructed defensive positions including the Bagration flèches and the Great Redoubt. Napoleon attacked them repeatedly with infantry, cavalry and massed artillery.
Positions were captured, lost and recaptured.
By evening the Russian army withdrew, leaving Napoleon in possession of the battlefield and the road to Moscow.
Yet the Russian army had not been destroyed.
Napoleon later described Borodino as the most terrible of his battles, adding that the French had shown themselves worthy of victory while the Russians had earned the right to call themselves invincible.
That assessment feels remarkably appropriate. Borodino was technically a victory, but one bought at a price Napoleon could scarcely afford.
Why it mattered: It opened Moscow to Napoleon without destroying the Russian army, setting the conditions for the disaster that followed.
4. Battle of Ulm, September to October 1805
War: War of the Third Coalition
Commanders: Napoleon Bonaparte against General Karl Mack
Forces: More than 150,000 French troops involved in the wider manoeuvre against Mack’s Austrian army
Result: Decisive French victory
Ulm was less a single battle than an operational masterpiece.
That is precisely why it belongs so high.
Napoleon moved the Grande Armée rapidly from the Channel coast towards the Danube, crossed behind the Austrian army and severed Mack’s communications.
French corps converged from several directions.
Mack found himself trapped around Ulm and surrendered tens of thousands of troops.
The campaign demonstrated one of Napoleon’s greatest strengths: armies did not have to be destroyed through frontal battle if manoeuvre could place them in an impossible position first.
Why it mattered: Ulm eliminated a major Austrian army with comparatively limited French losses and prepared the way for Austerlitz.
3. Battle of Austerlitz, 2 December 1805
War: War of the Third Coalition
Commanders: Napoleon Bonaparte against Tsar Alexander I and the Austro-Russian command
Forces: Around 73,000 French against approximately 85,000 Coalition troops
Result: Decisive French victory
If this list ranked battles purely by tactical brilliance, Austerlitz would probably be first.
Napoleon deliberately encouraged the Allies to believe his right flank was vulnerable. They moved troops southwards to exploit the apparent weakness.
That weakened their centre.
French troops under Marshal Soult then attacked the Pratzen Heights, splitting the Allied army.
Napoleon told his troops afterwards:
“Soldiers, I am satisfied with you.”
He had reason to be.
The Third Coalition collapsed, Austria sought peace and the political map of Central Europe was transformed.
Why it mattered: Austerlitz represented the high point of Napoleon’s battlefield system and destroyed the Third Coalition.
2. Battle of Waterloo, 18 June 1815
War: War of the Seventh Coalition
Commanders: Napoleon Bonaparte against the Duke of Wellington and Gebhard von Blücher
Forces: Around 73,000 French against approximately 68,000 men under Wellington, reinforced during the battle by substantial Prussian forces
Result: Decisive Coalition victory
Waterloo is probably the most famous battle on this list, although fame and military importance should never be confused.
Napoleon attacked Wellington’s army south of Brussels while attempting to prevent the Prussians from reuniting with it.
French assaults battered Hougoumont, La Haye Sainte and Wellington’s main ridge. D’Erlon’s infantry attacked. Ney launched massed cavalry charges. The Imperial Guard eventually advanced.
Wellington held.
Then Blücher’s Prussians arrived in growing numbers against Napoleon’s eastern flank.
The Imperial Guard’s final attack failed and the French army collapsed.
Wellington later famously described the campaign as:
“The nearest run thing you ever saw in your life.”
Why it mattered: Waterloo ended Napoleon’s Hundred Days and his political career permanently.
1. Battle of Leipzig, 16 to 19 October 1813
War: War of the Sixth Coalition
Commanders: Napoleon Bonaparte against Coalition armies under Schwarzenberg, Blücher, Bernadotte and others
Forces: Roughly 190,000 French and allied troops against more than 300,000 Coalition troops over the course of the battle
Result: Decisive Coalition victory
Leipzig was the great collision of Napoleonic Europe.
French, Polish, German, Russian, Austrian, Prussian and Swedish troops fought around the city for four days. The scale dwarfed most earlier European battles.
Napoleon initially held his position, but Coalition reinforcements continued arriving. His own resources were finite.
The retreat became disastrous when the bridge over the Elster was destroyed prematurely, trapping thousands of French troops.
Marshal Józef Poniatowski, recently made a Marshal of France, drowned while attempting to escape.
Why it mattered: Leipzig destroyed Napoleon’s position in Germany and forced him back towards France.
The Final Ranking
| Rank | Battle | Date | Result |
|---|---|---|---|
| 1 | Leipzig | 1813 | Coalition victory |
| 2 | Waterloo | 1815 | Coalition victory |
| 3 | Austerlitz | 1805 | French victory |
| 4 | Ulm | 1805 | French victory |
| 5 | Borodino | 1812 | French tactical victory |
| 6 | Jena-Auerstedt | 1806 | French victory |
| 7 | Trafalgar | 1805 | British victory |
| 8 | Wagram | 1809 | French victory |
| 9 | Friedland | 1807 | French victory |
| 10 | Pyramids | 1798 | French victory |
| 11 | Marengo | 1800 | French victory |
| 12 | Dresden | 1813 | French victory |
| 13 | Vitoria | 1813 | Allied victory |
| 14 | Salamanca | 1812 | Allied victory |
| 15 | Aspern-Essling | 1809 | Austrian victory |
| 16 | Bautzen | 1813 | French victory |
| 17 | Eylau | 1807 | Inconclusive |
| 18 | Maloyaroslavets | 1812 | Strategic Russian success |
| 19 | La Rothière | 1814 | Coalition victory |
| 20 | Lützen | 1813 | French victory |
Which Was the Largest Battle of the Napoleonic Wars?
Leipzig was the largest battle of the Napoleonic Wars.
More than half a million soldiers may have been involved across the four days, although estimates differ according to which formations historians include.
| Battle | Approximate forces involved |
| Leipzig | 450,000 to 550,000+ |
| Wagram | 280,000 to 310,000 |
| Borodino | 250,000 to 270,000 |
| Jena-Auerstedt | 200,000+ across both battles |
| Waterloo | Around 190,000 over the course of the battle |
| Austerlitz | Around 158,000 |
Leipzig’s scale explains its later name, the Battle of the Nations. Much of Europe seemed to have turned up, usually carrying artillery.
What Was Napoleon’s Greatest Victory?
Austerlitz is the strongest candidate.
Napoleon encouraged the Allies to attack his apparently weak right flank before striking their depleted centre.
It combined deception, timing, manoeuvre and concentration of force with devastating political consequences.
Ulm deserves an honourable mention. Napoleon effectively destroyed an Austrian army through operational manoeuvre before the decisive confrontation had properly begun.
Austerlitz was the more spectacular battle. Ulm may have been the cleverer campaign.
What Was Napoleon’s Worst Defeat?
It depends upon what we mean by “worst”.
Waterloo ended Napoleon’s career.
Leipzig shattered his control of Germany.
The Russian campaign of 1812 destroyed much of the military power on which his empire depended.
If restricted to an individual battle, I would choose Leipzig.
Napoleon lost more than soldiers there. He lost the strategic system that had maintained French domination across Central Europe.
Weapons Used in the Napoleonic Battles
The colourful uniforms tend to dominate paintings of the period, but Napoleonic warfare was increasingly shaped by massed firearms and artillery.
Infantry weapons
Most infantry carried smoothbore flintlock muskets fitted with socket bayonets.
Common weapons included:
- French Charleville-pattern muskets
- British Brown Bess muskets
- Austrian and Prussian military muskets
- Baker rifles used by specialist British rifle units
Smoothbore muskets were inaccurate at extended ranges, encouraging commanders to concentrate fire through disciplined volleys.
Cavalry swords
Cavalry remained an important shock arm.
Heavy cavalry often carried long, relatively straight swords suitable for powerful cuts and thrusts.
Light cavalry commonly used curved sabres.
Cuirassiers, dragoons, hussars, chasseurs and other mounted troops could exploit broken infantry formations with frightening speed.
Artillery
Napoleon began his career as an artillery officer, and artillery remained central to his battlefield methods.
Field guns fired:
- Solid round shot
- Canister
- Howitzer shells
At battles such as Wagram, Borodino and Leipzig, enormous concentrations of artillery could dominate sections of the battlefield.
Round shot did particularly unpleasant things to tightly packed infantry formations. Napoleonic warfare becomes considerably less romantic once the surgeon’s reports enter the discussion.
Why These Battles Changed European Warfare
Napoleon did not invent every military development associated with his era.
Many had emerged from the French Revolutionary Wars.
His achievement was combining them exceptionally well.
The corps system allowed formations to march independently while remaining capable of concentrating rapidly. Mass conscription provided France with enormous manpower. Artillery could be gathered at decisive points, while infantry and cavalry worked together within increasingly sophisticated operational systems.
Speed mattered enormously.
Napoleon repeatedly concentrated superior forces against isolated opponents before their allies could intervene.
Eventually his enemies learned.
Prussia transformed its army after Jena-Auerstedt. Austria repeatedly reorganised. Russia demonstrated that territorial depth could frustrate Napoleon’s search for a decisive conclusion. Britain maintained pressure through naval supremacy, finance and the Peninsular War.
By 1813 Napoleon faced commanders who had spent years studying how he fought.
That is one reason Leipzig matters so much.
Napoleon was still capable of brilliance.
His opponents were simply becoming much harder to fool.
The Human Cost of the Napoleonic Battles
Battle maps can make warfare look deceptively tidy.
Blue formations move towards red formations. Arrows indicate attacks. Someone wins.
The reality was hideous.
Musket balls shattered bone. Round shot could pass through several ranks of infantry. Canister transformed artillery into enormous battlefield shotguns at close range. Cavalry swords and bayonets produced horrific wounds.
Surviving the battlefield was only the beginning.
Infection, disease, hunger and exposure killed enormous numbers of soldiers.
The Russian campaign provides the most extreme example. The Grande Armée was already being destroyed by disease, desertion, hunger and logistical failure before the worst winter conditions arrived.
The scale of Napoleon’s campaigns remains fascinating, but admiration for his operational skill should never obscure what those operations required from the men who actually marched and fought them.
Takeaway
Napoleon’s reputation understandably dominates the period.
Austerlitz shows why.
Yet the later battles are, to me, every bit as interesting.
At Eylau his enemies discovered that the Grande Armée could be stopped. At Aspern-Essling they proved Napoleon could be defeated. Russia demonstrated that denying him the decisive political settlement he wanted could itself become a strategy.
Then came Leipzig.
By 1813 the Coalition armies were learning to avoid Napoleon when circumstances favoured him, attack his subordinate commanders and use their enormous combined resources to keep returning after defeats.
Napoleon continued winning battles.
The problem was that his enemies no longer needed him to lose every battle.
That change eventually mattered more than any single tactical innovation.
