Country in Southeast Asia during the Cold War
Source (Wikipedia): North Vietnam

North Vietnam, officially the Democratic Republic of Vietnam, was a socialist state in Southeast Asia that existed from 1945 to 1976, with formal sovereignty being fully recognized in 1954. A member of the Eastern Bloc, it opposed the French-supported State of Vietnam and later the Western-allied Republic of Vietnam. The DRV emerged victorious over South Vietnam in 1975 and ceased to exist the following year when it unified with the south to become the current Socialist Republic of Vietnam.