United States Air Force
The U.S. War Department created the first antecedent of the U.S. Air Force, as a part of the U.S. Army, on 1 August 1907, which through a succession of changes of organization, titles, and missions advanced toward eventual independence 40 years later. In World War II, almost 68,000 U.S. airmen died helping to win the war, with only the infantry suffering more casualties. In practice, the U.S. Army Air Forces (USAAF) was virtually independent of the Army during World War II, and in virtually all ways functioned as an independent service branch, but airmen still pressed for formal independence. The National Security Act of 1947 was signed on 26 July 1947 by President Harry S Truman, which established the Department of the Air Force, but it was not until 18 September 1947, when the first secretary of the Air Force, W. Stuart Symington, was sworn into office that the Air Force was officially formed as an independent service branch.
Tenth Air Force
Tenth Air Force was a United States Army Air Forces combat air force created for operations in India, Burma and Indochina during World War II in the China Burma India Theater of operations. It was established at New Delhi, India on 12 February 1942, around a nucleus of air force personnel newly arrived from Java and the Philippines, under the command of Major General (later Lieutenant General) Louis Brereton. In the years since World War II, the 10th Air Force has served both US air defense under the former Air Defense Command and Aerospace Defense Command, and reserve training and readiness programs under the cognizance of the Air Force Reserve (AFRES) and the Air Force Reserve Command (AFRC).