The Institution of Comradeship in Polish cohorts in XV-XVII and its effect on formation of "neuradova starshyna"
The Institution of Comradeship of Polish cohorts practice and formation of «neuryadova Cossack starshyna» till 1648 are analyzing. Effect of Polish system of comrade «zatah» and traditional Zaporozkyi Cossack organization on formation of «znachne» comradeship is reviewing.