Tschir / Чир

The Chir (Russian: Чир) is a river in Rostov and Volgograd oblasts of Russia. It is a right tributary of the Don, and is 317 kilometres (197 mi) long, with a drainage basin of 9,580 square kilometres (3,700 mi2).

Source: Wikipedia https://en.wikipedia.org/wiki/Chir_(river)