Answer:
After the U.S. had withdrawn all its troops, the fighting continued in Vietnam. ... South Vietnam officially surrendered to communist North Vietnam on April 30, 1975. On July 2, 1976, Vietnam was reunited as a communist country, the Socialist Republic of Vietnam.
A family had given up hope of finding the remains of a U.S. Airman missing since theVietnam War. We negotiated a peace deal then officially withdrew all forces in 1973. For the two years that followed, ending in 1975 when the NVA roled into Saigon, massive fighting broke out between the two countries.