The book contains one of the most iconic stories in the early history of the Ukrainian Cossack State (Zaporozian Empire) - Nizhyn General Rada 1663 r. (widely known in historical literature and journalism as “Chorna Rada”), as for the rich it is a symbol of the decline of the Cossack power and the territorial split of the Hetmanate into the right bank and left bank parts. The investigation reveals in detail the circumstances that allowed such a development of political processes in Cossack Ukraine, and reconstructs the overthrow of the military for the sake of 1663 rubles. and the closest heritage from it is clear. The publication is addressed to scholars, scholars, students of history departments, and anyone interested in the history of Ukraine.