The Amyr River flows from the Kolyvan Mountains to empty in the Beloye Sea?. Much of its path goes through Amyr? Oblast. In 1652 MG, an army led by Sergei Timurevich defeated a large horde of steppe nomads that had invaded Periaslavl at a bridge over the Amyr. This defense of the bridge is now celebrated in story and song throughout Periaslavl.