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Which Cossack leader advanced into the heart of Poland at the commencement of John Casimir's reign?

  • Bohdan Khmelnytsky

  • Stefan Czarniecki

  • Jerzy Sebastian Lubomirski

  • Ivan Mazepa

Answer

Bohdan Khmelnytsky, the prominent Cossack leader, initiated a decisive advancement into the heart of Poland during the early stages of John Casimir's reign. This bold move unfolded amidst Khmelnytsky's pursuit of autonomy for the Cossacks, igniting a conflict that deeply impacted the political landscape of the region.
Reigning Supreme: The Legacy of John II Casimir Vasa

Reigning Supreme: The Legacy of John II Casimir Vasa

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