The Seret River (Ukrainian: Серет) is the left tributary of the Dniester that flows through the Ternopil Oblast of Ukraine. Its length is 242 km; the basin covers some 3900 km2. The towns of Ternopil, Terebovlia and Chortkiv sit along the river's banks. Some of the bloodiest fighting of World War I took place on the banks of the Seret.
Coordinates: 48°37′12″N 25°51′25″E / 48.62°N 25.8569°E