Uprising of Bolotnikov False Dmitry II: Polish–Russian War: The Battle of Kozelsk was the first victory of False Dmitry II against the government of Tsar Vasili IV Shiuski.

[1] As the rebellion of Ivan Bolotnikov was coming to an end in central Russia, a new impostor, False Dmitry II, appeared on the Polish border, collecting Cossacks and Polish-Lithuanian mercenaries under his banner.

[1] In September 1607, False Dmitry II left Starodub with some 3,000 men in order to relieve Bolotnikov, besieged in Tula.

At Kozelsk, on October 8, 1607, the rebels won their first victory against the government troops of Vasili IV Shuiski.

[2] Despite the victory at Kozelsk, the capture of Tula on October 10 by Tsar Vasili made further efforts to relieve Bolotnikov meaningless.