when was the first nation mentioned above founded?
The State of Vietnam was created through co-operation between anti-communist Vietnamese and the French government and the South would continue to be a French dependency.
South Vietnam
The State of Vietnam was created through co-operation between anti-communist Vietnamese and the French government on 14 June 1949. Former emperor Bảo Đại accepted the position of chief of state ("quốc trưởng"). This was known as the "Bảo Đại Solution". The colonial struggle in Vietnam became part of the global Cold War. In 1950, China, the Soviet Union and other communist nations recognised the DRV while the United States and other non-communist states recognised the Bảo Đại government.

In July 1954, France and the Việt Minh agreed at the Geneva Conference that the Vietnam would be temporarily divided at 17th parallel north and State of Vietnam would rule the territory south of the 17th parallel, pending unification on the basis of supervised elections in 1956. At the time of the conference, it was expected that the South would continue to be a French dependency.
who was behind the 1964 brinks hotel bombing? Viet Cong commanders what kind of an organization is this? It was an armed communist political revolutionary organization in South Vietnam and Cambodia how did it originate? The Saigon-Cholon Peace Committee, the first Viet Cong front, was founded to provide leadership for south Vietnam group.
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South Vietnam [SEP] Founding of South Vietnam
Before World War II, the southern third of Vietnam was the concession (nhượng địa) of Cochinchina, which was administered as part of French Indochina. A French governor-general (toàn quyền) in Hanoi administered all the five parts of Indochina (Tonkin, Annam, Cochinchina, Laos, and Cambodia) while Cochinchina (Nam Kỳ) was under a French governor (thống đốc), but the difference from the other parts with most indigenous intelligensia and wealthy were naturalized French (Tourane now Đà Nẵng in the central third of Vietnam also enjoyed this privilege because this city was a concession too.) The northern third of Vietnam (then the colony (thuộc địa) of Tonkin (Bắc Kỳ) was under a French resident general (thống sứ).