War of the Third Coalition: French, Austrian and Russian units suffered heavy losses at the Battle of Dürenstein.

The War of the Third Coalition was a European conflict lasting from 1805 to 1806 and was the first conflict of the Napoleonic Wars. During the war, France and its client states under Napoleon I and its ally Spain opposed an alliance, the Third Coalition, which was made up of the United Kingdom, the Austrian Empire, the Russian Empire, Naples, Sicily, and Sweden. Prussia remained neutral during the war.

The Battle of Dürenstein or the Battle of Krems, on 11 November 1805, was an engagement in the Napoleonic Wars during the War of the Third Coalition. Dürenstein, Austria, is located in the Wachau valley, on the river Danube, 73 kilometers (45 mi) upstream from Vienna, Austria. The river makes a crescent-shaped curve between Dürnstein and nearby Krems an der Donau, and the battle was fought in the flood plain between the river and the mountains.