Yurii held on to the right bank , effectively partitioning the country .
1661 - 63 : Somko and the Starshina : In 1660 the left bank cossacks deposed Yurii Khmelnitsky because of the Polish alliance and made Yakym Somko Acting Hetman .
Yurii Khmelnitsky held on to the right bank , effectively partitioning the country .
1661 - 63 : Somko and the Starshina : In 1660 the left bank cossacks deposed Yurii Khmelnitsky because of the Polish alliance and made Yakym Somko Acting Hetman .