After a three-day battle Hostile_encounter on the banks of the river Irtysh , Yermak was victorious against a combined Cause_to_amalgamate force of Küçüm Khan and six allied Tatar princes .

The details are disputed Quarreling with Russian sources claiming Statement Yermak was wounded Bodily_harm and tried to escape Escaping by swimming Self_motion across the Wagay River which is a tributary of the Irtysh River , but drowned Killing under the weight of his own chainmail .

He had been in contact Connect with the tsar and had requested Request that a small region on the banks of the Irtysh River would be granted Giving as his dominion .

Su Dingfang 's army defeated Conquering Helu at the battle Hostile_encounter of Irtysh River .