The southern winner wasted no time before officially seceding from Vietnam to form the new Republic of Vietnam. Most people who have studied this conflict know it as South Vietnam, even if it was more southwestern than true south. History is like that. Full of odd compromises or outright falsifications by the victors to make them look better. Later Vietnamese governments would for instance never call the civilian VietCong a terrorist organization. They were freedom fighters, protecting the common man from vile capitalist pig dictators.