Austerlitz: The Battle of the Three Emperors
On the morning of 2 December 1805, a thick mist lay across the fields east of Brünn in Moravia. Somewhere beyond it, Russian and Austrian columns were moving down from the Pratzen Heights towards what appeared to be the vulnerable right flank of Napoleon Bonaparte’s army.
They believed the French were retreating. Napoleon had surrendered the commanding heights, weakened his right and allowed his enemies to think that he wished to avoid battle. Even his manner during negotiations had been calculated to suggest uncertainty. It was an illusion.
Hidden by the folds of the ground and the morning fog, French troops waited below the plateau. Napoleon had deliberately invited the Allies to attack the point where he appeared weakest. Once they committed themselves, he intended to strike the centre they had left behind and split their army in two.
As the mist began to clear, the sun broke through above the battlefield. Marshal Soult’s infantry advanced up the slopes of the Pratzen Heights. Within hours, the army of the Third Coalition was in retreat and Napoleon had won the most celebrated victory of his career.
Austerlitz became known as the Battle of the Three Emperors. Napoleon I of France, Tsar Alexander I of Russia and Francis II, Holy Roman Emperor and Emperor of Austria, were all associated with the armies gathered in Moravia. Yet the battle was decided by more than the presence of monarchs. It was a contest between two plans, one of which had been designed to make the other inevitable.
Background: The Third Coalition
Europe had been at war, with only brief interruptions, since the French Revolution. By 1805, Napoleon had transformed France from a revolutionary republic into an empire and had established himself as the dominant figure on the continent.
Britain remained his most persistent enemy. Napoleon assembled an army around Boulogne and threatened an invasion across the English Channel, but British naval power made the operation perilous. Meanwhile, Austria and Russia joined Britain, Sweden and Naples in a new alliance against France. The Third Coalition hoped to contain Napoleon before French influence expanded still further.
The coalition forced Napoleon to abandon his immediate plans against Britain. In August 1805, the army that had trained for an invasion of England turned east. Its organisation into self-contained corps allowed it to march rapidly along separate roads, support itself more easily and concentrate when battle approached.
The result was the Ulm campaign, one of the great operational victories of the Napoleonic Wars. French forces swept around the Austrian army of General Karl Mack and cut its communications. On 20 October, Mack surrendered at Ulm with tens of thousands of men.
The next day, the Franco-Spanish fleet was destroyed at Trafalgar. Britain had secured command of the sea, but on land Napoleon seemed unstoppable.
French troops entered Vienna on 13 November. The war was not over. A Russian army under General Mikhail Kutuzov had escaped Napoleon’s pursuit and moved north to join reinforcements and the remaining Austrian forces. Napoleon followed, but his position became increasingly uncertain. His men were deep inside enemy territory, his supply lines were extended and Prussia might yet enter the war against him.
Napoleon needed a decisive battle before the coalition grew stronger.
The three emperors
Napoleon I
Napoleon was 36 years old and had been Emperor of the French for only a year. He had already demonstrated an extraordinary ability to move armies quickly, identify the decisive point and concentrate overwhelming force upon it.
At Austerlitz, his greatest weapon was not artillery or cavalry. It was his understanding of what his opponents wanted to believe. The Allies saw a French army far from home, apparently hesitant and deployed in a questionable position. Napoleon encouraged every part of that interpretation.
Alexander I
Tsar Alexander I was 27. Intelligent, ambitious and eager for military glory, he exercised enormous influence over the Allied headquarters. The experienced Kutuzov favoured caution and understood the danger of attacking Napoleon on ground of his choosing. Alexander and the younger officers around him believed the opportunity was too good to waste.
The presence of the Tsar complicated the chain of command. Kutuzov was nominally the senior Russian commander, but he could not easily oppose the wishes of his sovereign. Authority became divided between the formal commander, the monarch and the staff officers who had designed the Allied plan.
Francis II
Francis II was Holy Roman Emperor but, also Francis I, Emperor of Austria. Austria had already suffered the catastrophe at Ulm and lost its capital. He was more cautious than Alexander, but his empire needed a reversal of fortune.
The title Battle of the Three Emperors gave the engagement an almost theatrical quality. In practical terms, however, the most consequential presence was that of Alexander. His desire to fight helped overcome Kutuzov’s reservations and committed the coalition to battle.
The battlefield
The battlefield lay near Austerlitz, now Slavkov u Brna in the Czech Republic, approximately ten kilometres south-east of Brno. Its central feature was the Pratzen Heights, a broad plateau rising above the surrounding countryside.
To the south ran the Goldbach stream through the villages of Telnitz and Sokolnitz. Farther south were the Satschan and Menitz ponds. To the north, the Brünn to Olmütz road crossed ground overlooked by the Santon and Zuran hills.
Possession of the Pratzen Heights offered observation and control of the centre. Napoleon had examined the ground carefully, yet he deliberately withdrew from the plateau before the battle. The Allies occupied it and interpreted the French movement as evidence of weakness.
Napoleon’s army numbered roughly 70,000 men, although estimates vary according to which formations are counted and when they reached the field. The combined Russian and Austrian army was larger, with approximately 85,000 to 90,000 troops. It also possessed a substantial advantage in artillery.
Numbers alone concealed an important difference. The French army was experienced, well organised and commanded by marshals accustomed to operating within Napoleon’s system. The Allied force combined troops of different armies, languages and levels of experience under an uncertain command structure.
Napoleon prepares the trap
Napoleon did not merely wait for the Allies to make a mistake. He constructed the conditions in which they were likely to make one.
He allowed his right flank to appear dangerously thin. He abandoned the Pratzen Heights. He requested negotiations and received Prince Peter Dolgorukov, an envoy from the Russian’s entourage, while presenting himself as anxious and cautious. Dolgorukov returned convinced that the French could be beaten.
The deception appealed directly to Allied expectations. Their leaders believed Napoleon was overextended and worried about his communications with Vienna. If they attacked southwards, crushed his right and reached the road behind him, they could cut his line of retreat.
Napoleon expected precisely such a movement. He planned to hold his right long enough for the Allied columns to leave the Pratzen Heights. Soult’s IV Corps would then attack the weakened Allied centre. Once the French seized the plateau, the enemy army would be divided.
The plan carried serious risk. If the French right collapsed too quickly, the Allies might reach Napoleon’s communications before his central attack succeeded. Much depended upon Marshal Louis-Nicolas Davout, whose III Corps was marching rapidly from the direction of Vienna. Some of his troops covered more than 110 kilometres in approximately two days to reach the battlefield.
The Allied plan
The Allied plan was largely the work of the Austrian chief of staff, General Franz von Weyrother. During a council of war on the night before the battle, he described a complex series of movements involving several columns.
Most of the Allied army would descend from the Pratzen Heights and attack the French right around Telnitz and Sokolnitz. Once that flank had been overwhelmed, the columns would wheel northwards and roll up the French line. Prince Bagration would hold the Allied right in the north, while cavalry and the Russian Imperial Guard supported the centre.
On paper, the plan offered the prospect of destroying Napoleon’s army. In practice, it required difficult night movements, precise timing and coordination between multinational formations. Orders were distributed late, routes crossed and some commanders did not fully understand what was expected of them.
The most serious weakness was conceptual. The plan assumed that the French right was weak by accident. It did not sufficiently consider the possibility that Napoleon wanted the Allies to attack there.
The battle begins
Fighting opened at about eight o’clock in the morning around Telnitz. Allied troops attacked through the fog and forced the French defenders from the village. The first elements of Davout’s corps began arriving after their exhausting march and were committed almost immediately.
Telnitz and nearby Sokolnitz changed hands amid fierce fighting. The French right bent under the pressure of superior numbers but did not break. Davout’s men had reached the point where Napoleon needed them most.
The Allied advance also began to lose coherence. Columns became congested around the villages and streams. Units moving south left gaps behind them. More and more troops descended from the Pratzen Heights to join the attack against the French right.
Napoleon watched from the Zuran hill. He had to judge the moment carefully. An early attack would meet an Allied centre that was still strong. A late one might allow his right flank to collapse.
At about nine o’clock, he asked Soult how long his divisions would need to reach the heights. Soult replied that they could do so in less than twenty minutes. Napoleon waited a little longer, then gave the order.
One sharp blow, he is reported to have said, and the war was over.
The attack on the Pratzen Heights
General Louis de Saint-Hilaire’s division and General Dominique Vandamme’s division advanced out of the mist. As they climbed the slopes, the rising sun broke through the cloud and fog. The image of the sun illuminating the French advance became inseparable from the legend of Austerlitz.
The Allies had not left the plateau entirely undefended, but they had weakened it severely. French infantry reached the heights and encountered increasingly determined resistance. The struggle was not the effortless seizure sometimes suggested by later paintings and proclamations. Musketry and bayonet fighting swept across the plateau as Allied units attempted to recover the position.
Kutuzov, now close to the fighting, tried to organise a defence and was wounded. Saint-Hilaire’s men were placed under intense pressure, but they held and renewed their advance. Vandamme’s troops fought around the Old Vineyards on the northern part of the heights.
The French capture of the Pratzen Heights transformed the battle. Napoleon had placed a powerful force across the centre of the Allied army. The troops fighting around Telnitz and Sokolnitz were now separated from Bagration’s wing in the north.
The coalition’s plan had not merely failed. It had placed much of the Allied army in exactly the position Napoleon intended.
The battle in the north
While Soult attacked the centre, heavy fighting continued north of the Pratzen Heights. Marshal Jean Lannes faced Bagration, while Marshal Joachim Murat directed French cavalry against the mounted forces of Prince Liechtenstein.
The cavalry struggle was confused and violent. Charges and countercharges crossed the open ground. French light cavalry withdrew behind supporting infantry when pressed, allowing volleys to disrupt their pursuers before heavier French cavalry entered the fight.
Lannes gradually forced Bagration backwards, but the Russian commander maintained sufficient order to avoid complete destruction. The fighting in the north fixed Allied troops who might otherwise have intervened against Soult’s attack on the centre.
The Imperial Guards collide
The Russian Imperial Guard counterattacked on the Pratzen Heights under Grand Duke Constantine, Alexander’s brother. Elite Russian infantry and cavalry struck Vandamme’s troops and briefly threatened the French hold on the plateau. A battalion of the French 4th Line lost its eagle, one of the few moments in the battle when Napoleon’s central attack appeared in real danger.
Napoleon responded with his own Guard cavalry. Mounted grenadiers, chasseurs and Mamluks entered the struggle, supported by French infantry and horse artillery. The clash between the elite reserves of the two empires became one of the most dramatic episodes of the day.
The Russian Guard was eventually driven back. French control of the heights was secured, and the remaining Allied forces in the south faced the threat of encirclement.
Collapse in the south
With the Allied centre broken and Bagration retreating in the north, Napoleon turned against the mass of troops still fighting near Sokolnitz and Telnitz. French forces descended from the Pratzen Heights and attacked their flank and rear.
Some Allied units escaped in reasonable order under commanders such as General Dmitry Dokhturov. Others disintegrated as roads became blocked and men struggled across frozen or marshy ground near the Satschan Ponds.
Napoleon’s official account claimed that thousands of enemy soldiers drowned after French artillery broke the ice. The story became one of the most famous images of Austerlitz, but the evidence does not support the scale of the catastrophe described in French propaganda. When the ponds were later drained, only a small number of human bodies were reportedly recovered, together with many horses and abandoned guns.
The retreat was nevertheless a disaster. Thousands of Allied soldiers had been killed, wounded or captured. Guns, standards and equipment were abandoned across the battlefield. By late afternoon, the battle was over.
Why Napoleon won
Napoleon’s victory is often described as a masterpiece of deception, but deception worked only because it was connected to a clear operational purpose.
First, Napoleon identified what the Allies most wanted to do. They hoped to turn his right flank and cut his communications with Vienna. He did not attempt to dissuade them. He made the opportunity appear irresistible.
Second, he accepted risk at a secondary point to create strength at the decisive one. The French right was genuinely vulnerable. Its survival depended upon Davout’s forced march and the ability of exhausted troops to hold villages against repeated attack. Napoleon calculated that they could hold long enough.
Third, the French command system responded more effectively once the battle began. Corps commanders understood Napoleon’s general intention and could act within it. The Allied plan demanded precise adherence to a complicated timetable, yet its command structure was divided and its movements became confused.
Finally, Napoleon chose the decisive moment well. Soult’s attack was launched after the Allies had committed heavily to the south but before the French right had given way. The timing converted an apparent weakness into a central breakthrough.
Casualties and immediate consequences
Casualty figures vary, but the contrast was stark. French losses were approximately 8,000 to 9,000 killed, wounded or missing. Allied losses were far greater, perhaps 25,000 to 30,000 killed, wounded or captured, together with around 180 guns and many standards.
Austria sought an armistice. On 4 December, Napoleon met Francis near a mill at Nasiedlowitz, and hostilities ceased shortly afterwards. The Treaty of Pressburg was signed on 26 December 1805. Austria surrendered territory, paid a large indemnity and withdrew from the Third Coalition.
Russia withdrew its forces. Britain remained at war and retained the naval supremacy secured at Trafalgar, but the continental coalition had collapsed.
Austerlitz also helped reshape the political map of Europe. In 1806, Napoleon created the Confederation of the Rhine from German states under French protection. Francis responded by dissolving the Holy Roman Empire, an institution that had existed in various forms for more than eight centuries.
The making of a legend
Napoleon understood the power of narrative. His proclamations presented Austerlitz as a victory of almost supernatural brilliance. The sunshine that appeared through the mist became the “Sun of Austerlitz”, a symbol he would invoke again years later.
Some of the battle’s most memorable episodes were enlarged in the telling. The drowning of thousands in the ponds was exaggerated. Famous remarks attributed to Napoleon may have been polished or reconstructed after the event. Paintings showed captured standards laid before an almost imperial deity.
None of this means that the victory itself was exaggerated. Austerlitz was decisive, and Napoleon’s conception of the battle was remarkable. The legend grew so easily because the reality was already extraordinary.
The battle also entered literature. In War and Peace, Leo Tolstoy used Austerlitz to strip away the romance of military glory. Prince Andrei lies wounded beneath an immense, indifferent sky while the ambitions of emperors suddenly appear small. It is a powerful counterpoint to Napoleon’s carefully manufactured image of triumph.
Strategic outcome
Austerlitz ended the War of the Third Coalition on the continent, but it did not bring lasting peace. Britain could not be defeated by a victory in Moravia, and Russia had been beaten rather than permanently reconciled. Prussia, alarmed by expanding French power in Germany, went to war the following year.
Napoleon’s triumph therefore contained the seeds of future conflict. Each victory expanded French influence, but expansion encouraged new coalitions. Austerlitz demonstrated the extraordinary effectiveness of Napoleon’s military system while making other European powers even more determined to resist it.
The battle stands beside Trafalgar as one of the defining events of 1805. Trafalgar confirmed that Britain would dominate the sea. Austerlitz confirmed that Napoleon dominated the land. Neither power could easily strike at the source of the other’s strength.
The enduring lesson
Austerlitz is often reduced to a simple story: Napoleon weakened his right, lured the Allies from the Pratzen Heights and broke their centre. The summary is accurate, but it can make the outcome appear effortless or predetermined.
Napoleon took a calculated risk. Davout had to arrive. The French right had to hold. Soult’s divisions had to seize the heights against determined resistance. The Russian Guard had to be defeated when it counterattacked. Failure at any of those points might have transformed the trap into a disaster.
The deeper lesson is that a commander can shape an enemy’s decision without controlling it. Napoleon understood Allied ambitions, offered them the opportunity they desired and prepared to exploit the predictable consequences. His opponents were not defeated simply because they made a poor plan. They were defeated because the battlefield they thought they understood had been constructed for them.
On the evening of 2 December 1805, three emperors remained in Moravia, but only one controlled the story of what had happened there. Beneath the winter sun at Austerlitz, Napoleon had turned apparent weakness into decisive victory and secured his place at the height of European power.
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