<P> From 1954 to 1975 , Vietnam was again divided into two separate nations , divided by the Bến Hải River in Quảng Trị Province at the 17th parallel . The North , ruled by a communist government , was allied with communist China and the Soviet Union , while the South had a free - market economy , quasi-democratic government and had contact with the United States , the West and Western - aligned nations . Although the nation has been united since 1975 , linguistic , cultural , and other differences serve to delineate the two regions from one another , with accompanying stereotypes . </P>
<P> From 1954 to 1975 , Vietnam was again divided into two separate nations , divided by the Bến Hải River in Quảng Trị Province at the 17th parallel . The North , ruled by a communist government , was allied with communist China and the Soviet Union , while the South had a free - market economy , quasi-democratic government and had contact with the United States , the West and Western - aligned nations . Although the nation has been united since 1975 , linguistic , cultural , and other differences serve to delineate the two regions from one another , with accompanying stereotypes . </P>
when did north and south vietnam become one country
when did north and south vietnam become one country
1975
1975