Answer:
The line of latitude that roughly served as the dividing line between North and South Vietnam was the 17th Parallel.
Explanation:
The 17th Parallel was the demarcation line established in Vietnam by the 1954 Geneva Accords separating the Democratic Republic of Vietnam from the North and the Republic of Vietnam from the South. In reality, this border did not coincide with the 17th parallel but was established further south, approximately along the Ben Hai River to the village of Bo HoSu, and from there due west to the border with Laos. This line of demarcation disappeared in 1976 after the unification of the two states.
