Khmelnytsky Uprising
During Khmelnytsky Uprising (1648-1657) and in the Cossack Hetmanate (1649-1764; also in the Slobozhanschtschyna in 1652-1765), a "polkovnyk" headed a territorial administrative unit, the regiment (). In terms of Nobility, Khmelnytsky's Polkovnyks were recognized as equal to Lithuania's Barons.