# List of battles of the War of the Third Coalition

This is a list of sieges, land and naval battles of the War of the Third Coalition (18 May 1803 / 25 September 1805 – 26 December 1805 / 18 July 1806, depending on periodisation). It includes:
* the Trafalgar campaign (March–November 1805);
* the Ulm campaign (25 September – 20 October 1805);
* the Venetian campaign in modern-day Veneto (October–November 1805);
* the Austerlitz campaign in modern-day Austria and Czechia (30 October – 2 December 1805);
* the Hanover Expedition or Weser Expedition (19 November 1805 – 15 February 1806);
* the Invasion of Naples (1806) (8 February – 18 July 1806), with the Battle of Mileto (28 May 1807) as a last reprise.
* It also includes the British conquest of the Dutch Cape Colony (in modern-day South Africa) and Dutch Surinam from the French-aligned Batavian Republic, and some naval engagements between British and French(-Spanish/-Batavian) forces in the Caribbean and the English Channel.
| Date | Battle | Front | French forces | Coalition forces | Notes |
| 5 May 1804 | Battle of Suriname | Caribbean | Batavian Republic French First Republic | United Kingdom | British victory |
| 31 May – 2 June 1805 | Battle of Diamond Rock | Caribbean Trafalgar | First French Empire Bourbon Spain | United Kingdom | French victory |
| 15 July 1805 | Action of 15 July 1805 | Channel | First French Empire | United Kingdom | French victory |
| 18 July 1805 | Battle of Blanc-Nez and Gris-Nez | Channel | Batavian Republic First French Empire | United Kingdom | French victory |
| 22 July 1805 | Battle of Cape Finisterre (1805) | Atlantic Trafalgar | First French Empire Bourbon Spain | United Kingdom | Inconclusive |
| 10 August 1805 | Action of 10 August 1805 | Atlantic Trafalgar | First French Empire | United Kingdom | Coalition victory |
| 7 October 1805 | Battle of Donauwörth | Germany Ulm | First French Empire | Austrian Empire | French victory |
| 8 October 1805 | Battle of Wertingen | Germany Ulm | First French Empire | Austrian Empire | French victory |
| 9 October 1805 | Battle of Günzburg | Germany Ulm | First French Empire | Austrian Empire | French victory |
| 11 October 1805 | Battle of Haslach-Jungingen | Germany Ulm | First French Empire | Austrian Empire | French victory |
| 14 October 1805 | Battle of Memmingen | Germany Ulm | First French Empire | Austrian Empire | French victory |
| 14 October 1805 | Battle of Elchingen | Germany Ulm | First French Empire | Austrian Empire | French victory |
| 16–19 October 1805 | Battle of Ulm | Germany Ulm | First French Empire | Austrian Empire | French key victory |
| 18 October 1805 | Battle of Verona (1805) | Italy Venice | First French Empire | Austrian Empire | French victory |
| 21 October 1805 | Battle of Trafalgar | Atlantic Trafalgar | First French Empire Bourbon Spain | United Kingdom | Coalition key victory |
| 30 October 1805 | Battle of Caldiero (1805) | Italy Venice | First French Empire | Austrian Empire | French victory |
| 30 October 1805 | Battle of Mehrnbach | Austria Austerlitz | First French Empire | Austrian Empire Russian Empire | French victory |
| 31 October 1805 | Battle of Lambach | Austria Austerlitz | First French Empire | Austrian Empire Russian Empire | French victory |
| 4 November 1805 | Battle of Cape Ortegal | Atlantic Trafalgar | First French Empire | United Kingdom | Coalition victory |
| 5 November 1805 | Battle of Amstetten | Austria Austerlitz | First French Empire | Austrian Empire Russian Empire | Inconclusive |
| 8 November 1805 | Battle of Mariazell | Austria Austerlitz | First French Empire | Austrian Empire | French victory |
| 11 November 1805 | Battle of Dürenstein | Austria Austerlitz | First French Empire | Russian Empire Austrian Empire | Inconclusive |
| 13 November 1805 | Capitulation of Dornbirn | Austria Austerlitz | First French Empire | Austrian Empire | French victory |
| 16 November 1805 | Battle of Schöngrabern | Austria Austerlitz | First French Empire | Russian Empire | French victory |
| 19 November 1805 – 15 February 1806 | Hanover Expedition | Germany Weser | First French Empire  Kingdom of Prussia | United Kingdom Russian Empire Sweden | French victory Prussia occupies Hanover |
| 24 November 1805 | Battle of Castelfranco Veneto | Italy Venice | First French Empire | Austrian Empire | French victory |
| 25 November 1805 | Battle of Wischau | Czechia Austerlitz | First French Empire | Russian Empire | Coalition victory |
| 2 December 1805 | Battle of Austerlitz | Czechia Austerlitz | First French Empire | Austrian Empire Russian Empire | French key victory |
| 8 January 1806 | Battle of Blaauwberg | S. Africa Cape | Batavian Republic | United Kingdom | Coalition victory |
| 8 February – 18 July 1806 | Invasion of Naples (1806) | Italy Naples | First French Empire Kingdom of Italy | Kingdom of Naples United Kingdom Russian Empire | French victory |
| 26 February – 18 July 1806 | Siege of Gaeta (1806) | Italy Naples | First French Empire Italy Polish Legions Switzerland | Kingdom of Naples | French key victory |
| 9 March 1806 | Battle of Campo Tenese | Italy Naples | First French Empire Polish Legions Switzerland | Kingdom of Naples | French victory |
| 4 July 1806 | Battle of Maida | Italy Naples | First French Empire 2 Polish battalions 1 Swiss battalion | United Kingdom Royal Corsicans Royal Sicilians | Coalition victory |
| 28 May 1807 | Battle of Mileto | Italy Naples | First French Empire | Kingdom of Sicily | French victory |