Polish–Ottoman War (1620–1621)

It ended with the Commonwealth withdrawing its claims on Moldavia and led to the eventual demise of the Sultan Osman II.

The Commonwealth was relatively uninvolved in this war but the Polish king, Zygmunt III Waza, sent an elite and ruthless mercenary unit, the Lisowczycy, to aid his Habsburg allies.

They defeated the Hungarian lord George Rákóczi at the Battle of Humenné in 1619, and thus, cut the supply lines of Transylvanian forces.

Thus, the sultan agreed to help Bethlen, gathering a large Ottoman army with the intent of a punitive invasion of the Commonwealth.

The Turks, following their victory in the Battle of Ţuţora, had high hopes of conquering Ukraine (then a part of Poland), and perhaps even toppling the Commonwealth entirely and reaching the Baltic Sea.