The Bến Hải River (Vietnamese: Sông Bến Hải) is a river in central Vietnam which became an important landmark in the partition of the country into a northern and a southern zone along the 17th parallel by the Geneva Accords of 1954 then ended in 1976. The demilitarized zone (DMZ) separating the two parts extended about 5 kilometers (3.1 mi) from either side of the river.