 When the U.S. Air Force was established as an independent service in 1947, the National Guard was further divided into the Army National Guard and the Air National Guard.Under this construct, the 1933 defense act's "dual enlistment" facet was further amended so that enlisted soldiers and commissioned officers in the Army National Guard were also enlisted or commissioned in the Reserve Component of the U.S. Army.Enlisted airmen and commissioned officers in the Air National Guard were also enlisted or commissioned in the Air Reserve Component (ARC) of the U.S. Air Force.