A Hetman is a historical title used in Eastern Europe, particularly in the context of the Cossacks and the Polish-Lithuanian Commonwealth. It originally referred to a military leader or commander, often responsible for organizing troops and leading them in battle. The role evolved over time to include political authority, especially in regions like Ukraine, where the Hetman served as a governor or leader of the Cossack state. The title gained prominence during the 16th to 18th centuries, with notable Hetmans such as Bohdan Khmelnytsky and Ivan Mazepa. These leaders played significant roles in shaping the political landscape of their regions, often negotiating with larger powers like Russia and Poland. The Hetmanate, a Cossack state in Ukraine, was governed by these leaders until its eventual dissolution.