 Finally, Ukraine was split along the Dnieper River, leaving the western part, right-bank Ukraine, under Polish rule and the eastern part (Left-bank Ukraine and Kiev) under Russian rule.Later, in 1670–71, the Don Cossacks led by Stenka Razin initiated a major uprising in the Volga Region, but the Tsar's troops were successful in defeating the rebels.In the east, the rapid Russian exploration and colonisation of the huge territories of Siberia was led mostly by Cossacks hunting for valuable furs and ivory.