when was the united states air force founded
The United States Air Force (USAF) is the aerial and space warfare service branch of the United States Armed Forces and one of the seven American uniformed services. Initially established as a part of the United States Army on 1 August 1907, the USAF was formed as a separate branch of the U.S. Armed Forces on 18 September 1947 under the National Security Act of 1947. It is the most recent branch of the U.S. Armed Forces to be formed. The USAF is the largest and most technologically advanced air force in the world. The service articulates its core missions as air and space superiority, global integrated ISR, rapid global mobility, global strike, and command and control.