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There was NO South Vietnam in the 1940's.
Diem, later Thieu.
GEN Nguyen Cao Ky, Vice President of South Vietnam & A-1 Skyraider Fighter Bomber Pilot of the South Vietnamese Air Force.
North Vietnam launched an invasion of South Vietnam.North Vietnam launched an invasion of South Vietnam.
South Vietnam. In the Vietnam war when south Vietnam lost the communism took over south Vietnam.Before that north Vietnam & south Vietnam were different colonies.