Demilitarized Zone or DMZ is the boundary line between North Vietnam and South Vietnam. Was set up in Geneva in 1954 after the end of the war with France. This border is parallel to the 17th parallel, with the Ben Hai River forming the northern and southern Vietnamese boundary. It has a long steel spiral bridge that can be used as a link. At first this demilitarized zone. France intends to divide Vietnam into two countries temporarily until it chooses. A new election in the next 2 years, but the election has never returned. And Vietnam was divided along this line until North Vietnam and South Vietnam. Officially in 1976.