With the establishment of the Hetman state in 1648 , it was officially known as the General Military Council until 1750 .
Originally established at the Zaporizhian Sich , the rada ( council ) was an institution of Cossack administration in Ukraine from the 16th to the 18th century .
With the establishment of the Hetman state in 1648 , institution was officially known as the General Military Council until 1750 .
Originally established at the Zaporizhian Sich , the rada ( council ) was an institution of Cossack administration in Ukraine from the 16th to the 18th century .