The Battle of Khotyn or Battle of Chocim or Khotyn War was a combined siege and series of battles which took place from 2 September to 9 October 1621 between a Polish-Lithuanian army with Cossack allies, commanded by the Grand Hetman of Lithuania Jan Karol Chodkiewicz, and an invading Ottoman Imperial army, led by Sultan Osman II, which was stopped until the first autumn snows. On 9 October, due to the lateness of the season and heavy losses - due to failed assaults on Commonwealth fortifications - the Ottomans abandoned their siege and the battle concluded with a stalemate, which is reflected in the treaty where some sections favour the Ottomans while others favoured the Commonwealth. Chodkiewicz died on 24 September 1621 shortly before concluding a treaty with the Turks.

Petro Konashevych-Sahaidachny was a political and civic leader, who was a Hetman of Ukrainian Cossacks from 1616 to 1622. During his tenure, he transformed Zaporozhian Cossacks from irregular military troops into a regular army and improved relations between the Cossacks, the Orthodox clergy and peasants of Ukraine, which would later contribute to the establishment of a modern Ukrainian national consciousness. A military leader of the Polish–Lithuanian Commonwealth both on land and sea, Sahaidachny is best known for the significant role his troops played in the Battle of Khotyn against the Ottoman Empire in 1621, as well as the Polish Prince Władysław IV Vasa's attempt to usurp the Russian throne in 1618.