section_path: Ruler of France/French Empire/War of the Third Coalition
section_name: War of the Third Coalition
paragraph_text: War of the Third Coalition
  
  By September 1805, Sweden, Russia, Austria, Naples and the Ottoman Empire had joined Britain in a coalition against France.
  
  In 1803 and 1804, Napoleon had assembled a force around Boulogne for an invasion of Britain. They never invaded, but the force formed the core of Napoleon's Grande Armée, created in August 1805. At the start, this French army had about 200,000 men organized into seven corps, artillery and cavalry reserves, and the élite Imperial Guard. By August 1805, the Grande Armée had grown to a force of 350,000 men, who were well equipped, well trained, and led by competent officers.
  
  To facilitate the invasion, Napoleon planned to lure the Royal Navy from the English Channel by a diversionary attack on the British West Indies. However, the plan unravelled after the British victory at the Battle of Cape Finisterre in July 1805. French Admiral Villeneuve then retreated to Cádiz instead of linking up with French naval forces at Brest for an attack on the English Channel.
  
  Facing a potential invasion from his continental enemies, Napoleon abandoned his invasion of England and sought to destroy the isolated Austrian armies in Southern Germany before their Russian ally could arrive in force. On 25 September, 200,000 French troops began to cross the Rhine on a front of 260 km (160 mi).
  
  Austrian commander Karl Mack had gathered most of the Austrian army at the fortress of Ulm in Swabia. Napoleon's army, however, moved quickly and outflanked the Austrian positions. After some minor engagements that culminated in the Battle of Ulm, Mack surrendered. For just 2,000 French casualties, Napoleon had captured 60,000 Austrian soldiers through his army's rapid marching.
  
  For the French, this spectacular victory on land was soured by the decisive victory that the Royal Navy attained at the Battle of Trafalgar on 21 October. After Trafalgar, the Royal Navy was never again seriously challenged by Napoleon's fleet.
  
  French forces occupied Vienna in November, capturing 100,000 muskets, 500 cannons, and the intact bridges across the Danube. Napoleon then sent his army north in pursuit of the Allies. Tsar Alexander I of Russia and Francis I decided to engage Napoleon in battle, despite reservations from some of their subordinates.
  
  At the Battle of Austerlitz, on 2 December, Napoleon deployed his army below the Pratzen Heights. He ordered his right wing to feign retreat, enticing the Allies to descend from the heights in pursuit. The French centre and left wing then captured the heights and caught the allies in a pincer movement. Thousands of Russian troops fled across a frozen lake to escape the trap and 100 to 2,000 of them drowned. About a third of the allied forces were killed, captured or wounded.
  
  The disaster at Austerlitz led Austria to seek an armistice. By the subsequent Treaty of Pressburg, signed on 26 December, Austria left the coalition, lost substantial territory to the Kingdom of Italy and Bavaria, and was forced to pay an indemnity of 40 million francs. Alexander's army was granted safe passage back to Russia.
  
  Napoleon went on to say, "The battle of Austerlitz is the finest of all I have fought". Frank McLynn suggests that Napoleon was so successful at Austerlitz that he lost touch with reality, and what used to be French foreign policy became a "personal Napoleonic one". Vincent Cronin disagrees, stating that Napoleon was not overly ambitious for himself, "he embodied the ambitions of thirty million Frenchmen".