イェルマーク
Prior to 1582, the area of what is now Sedelnikovsky District was a part of the Khanate of Sibir. That year Cossack ataman Yermak Timofeyevich defeated Kuchum Khan at the Battle of Chuvash Cape. Although Yermak was eventually killed after sacking Qashliq to the east, the Russian Empire retained control of the region. The area was secured in 1594 when Prince Andrey Yeletsky established a permanent garrison at Tara to the southwest.