The Russo-Ottoman War of 1710–11, also known as the Pruth River Campaign after the main event of the war, erupted as a consequence of the defeat by the Russian Empire of Sweden in the Battle of Poltava and the escape of the wounded Charles XII of Sweden to the court of the Ottoman Sultan Ahmed III. Following incessant Russian pressure and demands for Charles, the Ottomans declared war on Russia on 20 November 1710.