A Cossack Hetman was a leader of the Cossacks, a group of predominantly East Slavic people known for their military prowess and semi-nomadic lifestyle. The Hetman served as the military commander and political leader, often overseeing a territory known as the Cossack Hetmanate. This position was crucial in the 16th to 18th centuries, especially during conflicts with neighboring powers like Poland and Russia. The role of the Hetman included organizing military campaigns, managing local governance, and representing the Cossacks in diplomatic matters. Notable Hetmans, such as Bohdan Khmelnytsky, played significant roles in shaping the history of Ukraine and the Cossack community. The position eventually declined with the integration of Cossack territories into larger empires.