RVAF meaning in Governmental ?

The South Vietnam Air Force (Vietnamese: Không lực Việt Nam Cộng hòa - KLVNCH), officially the Republic of Vietnam Air Force (RVNAF; French: Force aérienne vietnamienne, FAVN) (sometimes referred to as the Vietnam Air Force or VNAF) was the aerial branch of the Republic of Vietnam Military Forces, the official military of the Republic of Vietnam (South Vietnam) from 1955 to 1975.

The RVNAF began with a few hand-picked men chosen to fly alongside French pilots during the State of Vietnam era. It eventually grew into the world's fourth largest air force at the height of its power, in 1974, just behind the Soviet Union, the USA and China. Other sources state that VNAF was the sixth largest air force in the world, just behind the Soviet Union, the USA, China, France and West Germany. It is an often neglected chapter of the history of the Vietnam War as they operated in the shadow of the United States Air Force (USAF). It was dissolved in 1975 after the Fall of Saigon; many of its members emigrated to the United States.