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Conquest of Sibir

Kuchum attempted to convert the Siberian Tatars, who were mostly shamanists, to Islam. His decision to conduct a raid on the Stroganov trading posts resulted in an expedition led by the Cossack Yermak against the Khanate of Sibir. Kuchum's forces were defeated by Yermak at the Battle of Chuvash Cape in 1582 and the Cossacks entered Iskar later that year. Kuchum reorganized his forces, killed Yermak in battle in 1584, and reasserted his authority over Sibir.

Over the next fourteen years, however, the Russians slowly conquered the Khanate. In 1598 Kuchum was defeated on the banks of the Ob and was forced to flee to the territories of the Nogai, bringing an end to his rule.