1638 Cossacks Register as Historical Source

The article gives the analysis of the register of cossacks in 1638 as one of the Ukrainian historical sources which contain data about the structure and special ethnic origin of the Zaporozhian Host before the beginning Liberation war in the middle of the 17th century. Attention is focused on the fundamentals of register formation based on the territorial principle which was initiated by the Kurukovo Agreement. The reasons for the absence of key positions such as a quartermaster (obozny), a judge (suddia) and a chancellor (pysar) in the registered army are being clarified. Information about the amount of payment for the service of Cossack officer is also valuable. The continuity of Cossack family traditions was traced, in particular through participation in the resistance to Turkish aggression and armed uprisings.