When was Indochina renamed Vietnam?

Answer 1

Indochina was never renamed Vietnam. The two terms refer to different things. Indochina was a French colony that included Vietnam, Laos, and Cambodia. Each became independent under its own name. The only reason that France ruled them as a unity was that simply helped administration. The various ethnic groups, Kinh (Vietnam), Khmer (Cambodia), and Lao (Laos) never saw Indochina as a federation.

However, the date when maps stopped identifying Dai Nam or Vietnam as independent and instead as part of Indochina was 1885. North Vietnam and South Vietnam returned with the dissolution of French indochina in 1954.