Note the small amount of territory gained to russia's west between 1584 and 1800. which of these was probably the most important factor limiting russian expansion into this territory?

Existing political elements in the area opposed Russian infringement. The steppe and timberland steppe of Ukraine and southern Russia is great farming area, however it was generally held by peaceful migrants. Any express that could drive off the migrants and fill the land with impose paying workers would extend its energy gigantically. Amid the period 1500 - 1800, this district was taken under Russian control.