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.