The battle began with the French army outnumbered. Napoleon had some 72,000 men and 157 guns for the impending battle, with about 7,000 troops under
Davout still far to the south in the direction of Vienna. The Allies had about 85,000 soldiers, seventy percent of them Russian, and 318 guns. At first, Napoleon was not confident of victory. In a letter written to Minister of Foreign Affairs
Talleyrand, Napoleon requested that Talleyrand not tell anyone about the upcoming battle because he did not want to disturb Empress
Joséphine. According to Frederick C. Schneid, the French Emperor's chief worry was how he could explain to Joséphine a French defeat.
Battlefield The battle took place about six miles (ten kilometres) southeast of the city of
Brno, between that city and Austerlitz () in what is now the Czech Republic. The northern part of the battlefield was dominated by the 700-foot (210-metre) Santon Hill and the 880-foot (270-meter)
Žuráň Hill, both overlooking the vital
Olomouc/Brno road, which was on an east–west axis. To the west of these two hills was the village of
Bellowitz (Bedřichovice), and between them, the Bosenitz (Roketnice) stream went south to link up with the Goldbach (Říčka) stream, the latter flowing by the villages of
Kobelnitz (Kobylnice),
Sokolnitz (Sokolnice), and
Telnitz (Telnice). The centrepiece of the entire area was the
Pratzen (Prace) Heights, a gently sloping hill. An aide noted that Napoleon repeatedly told his marshals, "Gentlemen, examine this ground carefully, it is going to be a battlefield; you will have a part to play upon it."
Allied plans and dispositions The Allied council met on 1 December to discuss proposals for the battle. Most Allied strategists had two fundamental ideas: contacting the enemy and securing the southern flank that held the communication line to Vienna. Although the Tsar and his immediate entourage pushed hard for a battle, Emperor Francis of Austria was more cautious, and he was seconded by Kutuzov, the Commander-in-Chief of the Russians and the Allied troops. The pressure to fight from the Russian nobles and the Austrian commanders, however, was too strong, and the Allies adopted the plan of the Austrian Chief-of-Staff,
Franz von Weyrother. This called for a main drive against the French right flank, which the Allies noticed was lightly guarded, and diversionary attacks against the French left. The Allies deployed most of their troops into four columns that would attack the French right. The
Russian Imperial Guard was held in reserve while Russian troops under
Bagration guarded the Allied right. The Russian Tsar stripped Kutuzov of his authority as Commander-in-Chief and gave it to Franz von Weyrother. In the battle, Kutuzov could (mainly) command the IV Corps/Column of the Allied army, although he was still the nominal commander because the Tsar was afraid to take over if his favoured plan failed. attacked the castle of Sokolnitz. The French, however, counterattacked and regained the village, only to be thrown out again. Conflict in this area ended temporarily when
Friant's division (part of III Corps) retook the village. Sokolnitz was perhaps the most contested area on the battlefield and would change hands several times as the day progressed. While the Allied troops attacked the French right flank, Kutuzov's IV Corps stopped at the Pratzen Heights and stayed still. Just like Napoleon, Kutuzov realized the importance of Pratzen and decided to protect the position. But the young Tsar did not, so he ordered the IV Corps to withdraw from the Heights. This act quickly pushed the Allied army into its grave.
Endgame Meanwhile, the northernmost part of the battlefield also witnessed heavy fighting.
The Prince of Liechtenstein's heavy cavalry began to assault
Kellermann's lighter cavalry forces after eventually arriving at the correct position in the field. The fighting initially went well for the French, but Kellerman's forces took cover behind General Caffarelli's infantry division once it became clear that Russian numbers were too great. Caffarelli's men halted the Russian assaults and permitted
Murat to send two cuirassier divisions (one commanded by
d'Hautpoul and the other one by
Nansouty) into the fray to finish off the Russian cavalry for good. The ensuing mêlée was bitter and long, but the French ultimately prevailed. On Napoleon's orders, Lannes then led his V Corps against
Bagration's men and, after hard fighting, drove the skilled Russian commander off the field. He wanted to pursue, but Murat, who was in control of this sector on the battlefield, was against the idea; Napoleon ultimately called off the attack. Napoleon's focus shifted towards the southern end of the battlefield, where the French and the Allies were still fighting over Sokolnitz and Telnitz. In an effective double-pronged assault, St. Hilaire's division and part of Davout's III Corps smashed through the enemy at Sokolnitz, which persuaded the commanders of the first two columns, Generals
Kienmayer and
Langeron, to flee as fast as they could. Buxhoeveden was completely drunk and fled as well. Kienmayer covered his withdrawal with the
O'Reilly light cavalry, who managed to defeat five of six French cavalry regiments before they had to retreat. General panic seized the Allied army, and it abandoned the field in all possible directions. A famous,
albeit disputed, episode occurred during this retreat: defeated Russian forces withdrew south towards Vienna via the frozen Satschan ponds. Napoleon deployed cannons on the heights of Augezd (now
Újezd), which decimated the troops now under
Dmitry Dokhturov, Buxhoeveden's replacement. French artillery pounded towards the men, and the ice was broken by the bombardment. The fleeing men drowned in the cold ponds, dozens of Russian artillery pieces going down with them. Estimates of how many guns were captured differ: there may have been as few as 38 or more than 100. Sources also differ about casualties, with figures ranging between 200 and 2,000 dead. Thanks to Dokhturov's coolness and resourcefulness, the troops were assembled near Neudorf (now
Nová Ves) by nightfall, but with "heavy" losses, as the Russian data confirms without clarifying a specific number. Many drowning Russians were saved by their victorious foes. However, local evidence later made public suggests that Napoleon's account of the catastrophe may have been exaggerated; on his instructions, the lakes were drained a few days after the battle, and the corpses of only two or three men, with some 150 horses, were found. On the other hand, Tsar Alexander I attested to the incident after the wars. ==Military and political results==