Russia had demonstrated an expansionist policy in the Siberian Far East from the reign of Ivan the Terrible in the 16th century .

Following Motion_directional a series of Tatar raids Attack in retaliation against the Russian advance Cause_to_make_progress , Yermak 's forces prepared GetReady for a campaign to take Creating Qashliq , the Siberian capital .

In the course of the fight Hostile_encounter , the Siberian royal family was captured Conquering by the Russians .