Numbered Air Force
A Numbered Air Force (NAF) is a type of organization in the United States Air Force that is subordinate to a Major Command (MAJCOM) and has assigned to it operational units such as wings, squadrons, and groups. A Component Numbered Air Force (C-NAF) has the additional role as an Air Force Component Command exercising command and control over air and space forces supporting a Unified Combatant Command. Unlike MAJCOMs, which have a management role, a NAF is a tactical organization with an operational focus, and does not have the same functional staff as a MAJCOM. Numbered air forces are typically commanded by a major general or a lieutenant general.
Numerical designations for Numbered Air Forces are written out (e.g., Eighth Air Force instead of 8th Air Force), but Arabic numerals are used in abbreviations (e.g., 8 AF). Units directly subordinate to a NAF are generally numbered 6XX (where XX is the NAF number). For example, the 618th Air and Space Operations Center (Tanker Airlift Control Center) is a unit subordinate to the Eighteenth Air Force.
Numbered air forces began as named organizations in the United States Army Air Corps before World War II. The first four NAFs were established as the Northeast, Northwest, Southeast, and Southwest Air Districts on 19 October 1940 to provide air defense for the United States. These Air Districts were redesignated as the 1st, 2nd, 3nd, and 4th Air Forces, respectively, on 26 March 1941. The Arabic numerals were changed to the First, Second, Third, and Fourth Air Forces on 18 September 1942. Other organizations established during this period and that became Numbered air forces include the Philippine Department Air Force (became Fifth Air Force), the Panama Canal Air Force (became Sixth Air Force), the Hawaiian Air Force (became Seventh Air Force), and the Alaskan Air Force (became Eleventh Air Force). After World War II, the US Air Force continued to use both named and numbered air forces. While named air forces were used in both tactical and support roles, numbered air forces were generally employed only in tactical roles.
As part of a peacetime restructuring in March 1946, the United States Army Air Forces were reorganized into three major operating commands: the Strategic Air Command (SAC), the Tactical Air Command (TAC), and the Air Defense Command (ADC). These commands reflected the basic air combat missions that evolved during the war, and each reported directly to General Carl Spaatz, the Commanding General, Army Air Forces. Numbered air forces served as an intermediate headquarters between these commands and the operational wings and groups. Eleven of the sixteen wartime air forces remained. The Eighth and Fifteenth Air Forces were assigned to SAC; the Third, Ninth, and Twelfth Air Forces were assigned to TAC; and the First, Second, Fourth, Tenth, Eleventh, and Fourteenth Air Forces were assigned to ADC. Second Air Force would later be transferred to SAC in 1949. The numbered air forces had both operational and administrative authority, and existed as a command level between major commands and air divisions. Although variations existed, and number air forces were often reassigned, this basic arrangement persisted throughout the Cold War.
The role of numbered air forces changed in the 1990s during the Air Force reorganization initiated by Air Force Chief of Staff General Merrill McPeak. The goal of the reorganization was to "streamline, take layers out, flatten (Air Force) organizational charts, while at the same time clarifying the roles and responsibilities of essential supporting functions." Numbered air forces were reorganized into tactical echelons focused on operations, and their administrative staff functions were eliminated. This reorganization also reduced the number of major commands, and eliminated the air divisions to place numbered air forces directly in command of operational wings.
The role of numbered air forces was again changed in 2006 with the implementation of the Component Air Force (C-NAF) concept. Some numbered air forces have an additional mission as the Air Force Component Command exercising command and control over air and space forces supporting a Unified Combatant Command. C-NAFs have a second designation to identify their role. For example, First Air Force, a numbered air force assigned to Air Combat Command, is designated as Air Force Northern (AFNORTH) in its role as the air component of the United States Northern Command. Most C-NAFs have an Air and Space Operations Center (AOC) to provide command and control of air and space operations for the supported combatant commander.
List of Numbered Air Forces 
The table below lists current and historical numbered air forces of the US Air Force, their C-NAF designation (if applicable), their current shield and station, and the major command (MAJCOM) to which they are currently assigned. Note that the lineage of some numbered air forces is continued by non-NAF organizations (e.g., the 15th Expeditionary Mobility Task Force continues the lineage of the Fifteenth Air Force).
Named Air Forces 
Named Air Forces operate at the same level as Numbered Air Forces. General Headquarters Air Force, the first named air force of the United States Army's air arm, began operations in 1935. The GHQ Air Force became the Air Force Combat Command in 1941. Several of the numbered air forces began as named air forces.
Since World War II other named air forces have existed in both operational and support commands. Air Forces Iceland, and the Central, Eastern, Japan, and Western Air Defense Forces, have provided air defense capability. The USAF Special Operations Force controlled operational special forces. The Crew, Flying, and Technical Training Air Forces served Air Training Command both in the air and on the ground. Pacific Air Force/FEAF (Rear) controlled both operational and support forces of Far East Air Forces. Air Materiel Force, European Area, and Air Materiel Force, Pacific Area, on the other hand, served primarily as logistical support establishments.
|Air Force||Shield||Station||Major Command||Comments|
|Air Forces Iceland||
||Naval Air Station Keflavik, Iceland||USAFE||Established in 1952. Performed air defense of Iceland and North Atlantic. Inactivated 28 June 2006|
|Air Materiel Force, European Area||Châteauroux-Déols Air Base, France||Air Force Logistics Command||From 1954 to 1962 served as the primary USAF logistical organization in Europe|
|Air Materiel Force, Pacific Area||Tachikawa Air Base, Japan||Air Force Logistics Command||Originated during World War II in 1944, served as the primary USAF logistical organization in the Pacific. Inactivated 1962.|
|Aviation Engineer Force||Wolters Air Force Base, Texas||Continental Air Command||Controlled aviation engineer organizations of the United States Army, on duty with the United States Air Force, 1951–1956|
|Central Air Defense Force||Richards-Gebaur Air Force Base, Missouri||Air Defense Command||Controlled ADC Radar and Interceptor units in the central United States, 1951-1960.|
|Crew Training Air Force||Randolph Air Force Base, Texas||Air Training Command||Provided training for air crews, 1952-1957.|
|Eastern Air Defense Force||
||Stewart Air Force Base, New York||Air Defense Command||Controlled ADC Radar and Interceptor units in the eastern United States, 1949-1960.|
|Flying Training Air Force||Randolph Air Force Base, Texas||Air Training Command||Provided flying training for combat crews and flying training leading to an aeronautical rating, 1951-1958.|
|Japan Air Defense Force||Nagoya Air Base, Japan||Far East Air Force||This air defense organization was established to replace the 314th Air Division, 1952–1954|
|Pacific Air Force/FEAF (Rear)||Hickam Air Force Base, Hawaii Territory||Far East Air Force||Established to control Air Force operations in the Pacific and Far East during the move of the Far East Air Forces (FEAF) from Japan to Hawaii, 1954–1957|
|Technical Training Air Force||Randolph Air Force Base, Texas||Air Training Command||Provided officer candidate training, indoctrination (basic) training, and technical training to Air Force personnel, 1951-1958.|
|USAF Special Operations Force||
||Eglin Air Force Base, Florida||Tactical Air Command||When the USAF Special Air Warfare Center became too large and cumbersome for center status, it was elevated to a named air force, 1962-1974.|
|Western Air Defense Force||Hamilton Air Force Base, California||Air Defense Command||Controlled ADC Radar and Interceptor units in the western United States, 1951-1960.|
|United States Air Forces Central||
||Shaw Air Force Base, South Carolina||Air Combat Command||Established in 1983. Air component of United States Central Command, a regional unified command. Responsible for air operations (either unilaterally or in concert with coalition partners) and developing contingency plans in support of national objectives for USCENTCOM's 20-nation area of responsibility in Southwest Asia.|
See also 
- AFI 38–101, Air Force Organization. 16 March 2011.
- AFI 38-205, Manpower & Quality Readiness and Contingency Management. 18 June 2002.
- AFH 33-337, The Tongue and Quill. 1 August 2004.
- Ravenstein, Charles (1986). Organization and Lineage of the United States Air Force. Washington, DC: Office of Air Force History.
- Schaffel, Kenneth (1991). The Emerging Shield: The Air Force and the Evolution of Continental Air Defense, 1945–1960. Washington, DC: Office of Air Force History.
- Air Force Historical Research Agency – Numbered Air Forces
- Nalty, Bernard (1997). Winged Shield, Winged Sword: A History of the United States Air Force, Volume 1. Washington, DC: Air Force History and Museums Program.
- Factsheets : Second Air Force (AETC)
- McPeak, Merrill (1995). Selected Works: 1990–1994. Maxwell AFB, Alabama: Air University Press.
- AFDD 2, Operations and Organization. 3 April 2007.
- Factsheets : 1st AF Mission. Accessed 29 January 2011.
- "Air Force Announces Decision On Location Of 24th Air Force". Aero-News Network. Retrieved 13 August 2009.
- Ravenstein, Charles A. (1996), The Organization and Lineage of the United States Air Force. Unites States Air Force Historical Research Center ISBN 0-912799-17-X
- United States Air Forces Central Factsheet