The Battle of Mir took place on 9 and 10 July 1812 during Napoleon's invasion of Russia. Three Polish Lancers divisions battled against Russian cavalry, ending in the first major Russian victory in the war.

The French invasion of Russia, also known as the Russian campaign and in Russia as the Patriotic War of 1812, was initiated by Napoleon with the aim of compelling the Russian Empire to comply with the continental blockade of the United Kingdom. Widely studied, Napoleon's incursion into Russia stands as a focal point in military history, recognized as among the most devastating military endeavors globally. In a span of fewer than six months, the campaign exacted a staggering toll, claiming the lives of nearly a million soldiers and civilians.