The Pennsylvania Air National Guard is the air force militia of the U.S. state of Pennsylvania. It is, along with the Pennsylvania Army National Guard, an element of the Pennsylvania National Guard. It is considered a part of the United States Air Force, as well as of the state.The Pennsylvania Air National Guard was formally established in 1947. During the Vietnam War, the PA Air Guard flew 134 supply missions to Vietnam in 1966-1967, becoming the first reserve air force ever to enter a combat zone without actually being mobilized.