Their commander-in-chief was known as a hetman.
The armed camp known as the Sich was their base, and their senior officers were known as starshyna. One of their leaders, Bohdan Khmelnytsky, concluded the Pereyaslav Agreement, and their supreme assembly was known as the rada. Their commander-in-chief was known as a hetman. Originating in the steps of the Ukraine, for 10 points, identify these peasant-soldiers who received privileges from the tsars in exchange for military service.
The armed camp known as the Sich was their base, and their senior officers were known as starshyna.
{Cossacks} [or {Kazaki}; or {Kozaky}]