Yermak Timofeyevich
The Russian conquest of Siberia began in July 1580 when some 540 Cossacks under Yermak Timofeyevich invaded the territory of the Voguls, subjects to Küçüm, the Khan of Siberia. They were accompanied by some Lithuanian and German mercenaries and prisoners of war. Throughout 1581, this force traversed the territory known as Yugra and subdued Vogul and Ostyak towns. At this time, they also captured a tax collector of Küçüm.