False Dmitry II
Russia was unofficially occupied during the early Time of Troubles by the Polish–Lithuanian Commonwealth, which had supported False Dmitry II as the Tsar of Russia since 1607. Tsar Vasili IV formed a military alliance with Sweden in 1609, providing a 5,000-strong auxiliary corps commanded by Jacob De la Gardie and Evert Horn to support Russian forces under Mikhail Skopin-Shuisky. The De la Gardie campaign was successful against False Dmitry II, dispersing his court in Tushino – a former village and town to the north of Moscow, but failed against the Polish–Lithuanians and was defeated at the Battle of Klushino on 4 June 1610.