
The United States Air Force (USAF) is the air service branch of the United States Armed Forces. It is a part of the United States Department of Defense (DoD) and is one of the six armed forces and one of the eight uniformed services of the United States. Tracing its origins to 1 August 1907, as a part of the United States Army Signal Corps, the Air Force was established by transfer of personnel from the Army Air Forces with the enactment of the National Security Act of 1947. It is the second youngest branch of the United States Armed Forces and the fourth in order of precedence. The United States Air Force articulates its core missions as air supremacy, global integrated intelligence, surveillance and reconnaissance, rapid global mobility, global strike, and command and control. The Department of the Air Force, which serves as the USAF's headquarters and executive department, is one of the three military departments of the Department of Defense. The Department of the Air Force is headed by the civilian secretary of the Air Force, who reports to the secretary of defense and is appointed by the president with Senate confirmation. The highest-ranking military officer in the Air Force is the chief of staff of the Air Force, who exercises supervision over Air Force units and serves as one of the Joint Chiefs of Staff. As directed by the secretary of defense and secretary of the Air Force, certain Air Force components are assigned to unified combatant commands.
Mergers / predecessors: Fuerzas Aéreas del Ejército de los Estados Unidos · Cuerpo Aéreo del Ejército de los Estados Unidos
The origins of the United States Air Force can be traced back to the Union Army Balloon Corps of the American Civil War. The Union Balloon Corps, established by aeronaut Thaddeus S. C. Lowe, provided aerial reconnaissance for the Union Army. This early use of balloons for military purposes marked the beginning of modern aerial warfare and set the stage for the development of the 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 every way 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, which established the Department of the Air Force, but it was not until 18 September 1947, when the first secretary of the Air Force, Stuart Symington, was sworn into office that the Air Force was officially formed as an independent service branch.
The act created the National Military Establishment (renamed Department of Defense in 1949), which was composed of three subordinate Military Departments, namely the Department of the Army, the Department of the Navy, and the newly created Department of the Air Force. Prior to 1947, the responsibility for military aviation was shared between the Army Air Forces and its predecessor organizations (for land-based operations), the Navy (for sea-based operations from aircraft carriers and amphibious aircraft), and the Marine Corps (for close air support of Marine Corps operations). The 1940s proved to be important for military aviation in other ways as well. In 1947, Air Force Captain Chuck Yeager broke the sound barrier in his X-1 rocket-powered aircraft, beginning a new era of aeronautics in America.
The predecessor organizations in the Army of today's Air Force are:
Aeronautical Division, Signal Corps (1 August 1907 – 18 July 1914)
Aviation Section, Signal Corps (18 July 1914 – 20 May 1918)
Division of Military Aeronautics (20 May 1918 to 24 May 1918)
U.S. Army Air Service (24 May 1918 to 2 July 1926)
U.S. Army Air Corps (2 July 1926 to 20 June 1941) and
U.S. Army Air Forces (20 June 1941 to 18 September 1947)
During the early 2000s, two USAF aircraft procurement projects took longer than expected, the KC-X and F-35 programs. As a result, the USAF was setting new records for average aircraft age.
Since 2005, the USAF has placed a strong focus on the improvement of Basic Military Training (BMT) for enlisted personnel. While the intense training has become longer, it also has shifted to include a deployment phase. This deployment phase, now called the BEAST, places the trainees in a simulated combat environment that they may experience once they deploy. While the trainees do tackle the massive obstacle courses along with the BEAST, the other portions include defending and protecting their base of operations, forming a structure of leadership, directing search and recovery, and basic self aid buddy care. During this event, the Military Training Instructors (MTI) act as mentors and opposing forces in a deployment exercise. In November 2022, the USAF announced that it will discontinue BEAST and replace it with another deployment training program called PACER FORGE.
In 2007, the USAF undertook a Reduction-in-Force (RIF). Because of budget constraints, the USAF planned to reduce the service's size from 360,000 active duty personnel to 316,000. The size of the active duty force in 2007 was roughly 64% of that of what the USAF was at the end of the first Gulf War in 1991. However, the reduction was ended at approximately 330,000 personnel in 2008 in order to meet the demand signal of combatant commanders and associated mission requirements. These same constraints have seen a sharp reduction in flight hours for crew training since 2005 and the Deputy Chief of Staff for Manpower and Personnel directing Airmen's Time Assessments.
On 5 June 2008, Secretary of Defense Robert Gates accepted the resignations of both the secretary of the Air Force, Michael Wynne, and the chief of staff of the Air Force, General T. Michael Moseley. In his decision to fire both men Gates cited "systemic issues associated with... declining Air Force nuclear mission focus and performance". Left unmentioned by Gates was that he had repeatedly clashed with Wynne and Moseley over other important non-nuclear related issues to the service. This followed an investigation into two incidents involving mishandling of nuclear weapons: specifically a nuclear weapons incident aboard a B-52 flight between Minot AFB and Barksdale AFB, and an accidental shipment of nuclear weapons components to Taiwan.
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This page was last updated on September 26, 2026
APA
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MLA
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Harvard
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BibTeX
@misc{vuelopedia_en_airline_united_states_air_force,
author = {{Vuelopedia}},
title = {{Fuerza Aérea de los Estados Unidos}},
publisher = {Fundación Poderia},
year = {2026},
date = {2026-09-26},
url = {https://vuelopedia.org/en/airline/united-states-air-force},
howpublished = {\url{https://vuelopedia.org/en/airline/united-states-air-force}},
urldate = {2026-10-18},
note = {Accessed 2026-10-18}
}Wikipedia
{{cite web |url=https://vuelopedia.org/en/airline/united-states-air-force |title=Fuerza Aérea de los Estados Unidos |website=Vuelopedia |publisher=Fundación Poderia |date=2026-09-26 |access-date=2026-10-18 |language=en}}Pick a model to see its aircraft.