Yermak Timofeyevich, a Cossack, led the first campaign of Russian conquest of Siberia during the reign of Ivan the Terrible in 1580–1582.
However, Kuchum Khan returned briefly and attacked Yermak on August 6, 1584 in the dead of night and killed most of his army.
Finally, in August 1598, Küçhüm Khan was defeated at the Battle of Urmin near the River Ob.
The Russians took the family members of Küçhüm Khan to Moscow and there they remained as hostages.
The struggle for dominance in the region continued for several years by the Taibughid successor Syed Ahmed Khan and the Shaybanid successor Ali ibn Kuchum Khan as well as the Russians.