The Second Battle of Polotsk took place during Napoleon's invasion of Russia. In this encounter the Russians under General Peter Wittgenstein attacked and defeated a Franco-Bavarian force under Laurent Gouvion Saint-Cyr. In the aftermath of this success, the Russians took Polotsk and dismantled Napoleon's operations in Belarus. Wittgenstein's victory set the stage for the Battle of Berezina in November, in which three Russian armies converged on Napoleon from separate directions.

Louis Adolf Peter, 1st Prince of Sayn-Wittgenstein-Ludwigsburg-Berleburg, better known as Peter Wittgenstein in English, was a prince of the German dynasty of Sayn-Wittgenstein and field marshal in the Imperial Russian Army during the Napoleonic Wars. He was nicknamed the Saviour of Saint-Petersburg.