Swedish invasion of Russia

Swedish invasion of Russia
	Part of the Great Northern War
	; The Battle of Poltava by Pierre-Denis Martin
Date	1 January 1708 — 8 July 1709
Location	Tsardom of Russia
Result	Russian victory
Belligerents
Tsardom of Russia; Cossack Hetmanate; Kalmyk Khanate; Sandomierz Confederation	Swedish Empire; Cossack supporters of Mazepa; (from October 1708); Warsaw Confederation
Commanders and leaders
Peter the Great; Aleksandr Menshikov ; Ivan Mazepa; (until October 1708); Ayuka Khan	Charles XII; Adam Ludwig Lewenhaupt; Ivan Mazepa; (from October 1708)
Strength
192,000	97,000
Casualties and losses
21,675–26,248 combat casualties; Thousands froze to death	15,088–19,085 combat casualties; 14,800–20,000+ captured; 13,759 froze to death

The invasion of Russia by Charles XII of Sweden was a campaign undertaken during the Great Northern War between Sweden and the allied states of Russia, Poland, and Denmark. The invasion began with Charles's crossing of the Vistula on 1 January 1708, and effectively ended with the Swedish defeat in the Battle of Poltava on 8 July 1709, though Charles continued to pose a military threat to Russia for several years while under the protection of the Ottoman Turks.