State of Vietnam
"Thanh niên Hành Khúc" was first adopted as the national anthem by the Provisional Central Government of Vietnam (Pre-government of the State of Vietnam. 1948–1949) on 14 June 1948, and it was inherited as a national anthem by the State of Vietnam (1949–1955) and the Republic of Vietnam (1955–1975). The lyrics of "Thanh Niên Hành Khúc" were revised by former President Ngo Dinh Diem in 1956.