Pacific Air Forces

Pacific Air Forces

Pacific Air Forces emblem
Active 3 August 1944 – present
Country  United States of America
Branch  United States Air Force
Type Major Command
Part of United States Pacific Command
Garrison/HQ Joint Base Pearl Harbor-Hickam, Hawaii
Nickname(s) PACAF
  • World War II
Asiatic-Pacific Campaign (1944–1945)
  • Army of Occupation
Japan (1945–1952)
  • Korean Service (1950–1953)
  • Vietnam Service (1961–1973)
  • Expeditionary Service
Cambodia (1973)
Gen. Terrence J. O’Shaughnessy
General Earle E. Partridge

Pacific Air Forces (PACAF) is a Major Command (MAJCOM) of the United States Air Force and is also the air component command of the United States Pacific Command (USPACOM). PACAF is headquartered at Joint Base Pearl Harbor-Hickam (former Hickam AFB), Hawaii, and is one of two USAF MAJCOMs assigned outside of the Continental United States, the other being the United States Air Forces in Europe - Air Forces Africa. Over the past sixty-five plus years, PACAF has been engaged in combat during the Korean and Vietnam Wars and Operations Desert Storm, Southern Watch, Northern Watch, Enduring Freedom and Iraqi Freedom.

The mission of Pacific Air Forces is to provide ready air and space power to promote U.S. interests in the Asia-Pacific region during peacetime, through crisis, and in war. PACAF organizes, trains, and equips the 45,000 Total Force personnel of the Regular Air Force, the Air Force Reserve and the Air National Guard with the tools necessary to support the Commander of United States Pacific Command. PACAF comprises three numbered Air Forces, nine main bases and nearly 375 aircraft.

The command's area of responsibility extends from the west coast of the United States to the east coast of Asia and from the Arctic to the Antarctic, more than 100,000,000 square miles (260,000,000 km2). The area is home to nearly two billion people who live in 44 countries.


Far East Air Forces

Not to be confused with Far East Air Force (United States), the military aviation organization of the United States Army in the Philippine Islands from 1941 to 1942.

In June 1944, Major General St. Clair Streett's Thirteenth Air Force was added to Allied Air Forces, South West Pacific Area. Lieutenant General George Kenney[1] created the Far East Air Forces (FEAF) from his Fifth Air Force headquarters, while the Advanced Echelon became the Fifth Air Force under Major General Ennis Whitehead, Sr.[2] The RAAF formed the Australian First Tactical Air Force under Air Commodore Harry Cobby in October 1944,[3] and when General Douglas MacArthur became commander of all Army forces in the Pacific, the Seventh Air Force was added as well.[4] Far East Air Forces (FEAF) was activated on 3 August 1944, at Brisbane, Queensland, Australia.[5] FEAF (Provisional) had actually been created on 15 June 1944, and Fifth Air Force assigned to it. FEAF was subordinate to the U.S. Army Forces Far East and served as the headquarters of Allied Air Forces Southwest Pacific Area.[6]

The creation of FEAF consolidated the command and control authority over United States Army Air Forces (USAAF) units widely deployed throughout the southwest Pacific in World War II. On 15 June 1945, Fifth Air Force, Clark Field, Luzon, Philippines; Seventh Air Force, Hickam Field, Hawaii, USA; and Thirteenth Air Force, Clark Field, Luzon, Philippines were assigned to FEAF to support combat operations in the Pacific.

With the end of World War II in September 1945, the USAAF found its units deployed throughout the Pacific, from Hawaii to India, from Japan to Australia, and based on a hundred island airstrips, along with bases in China and Burma. A realignment of these forces was needed by the USAAF to better organize its forces in the Pacific for peacetime. On 6 December 1945, Far East Air Forces was redesignated Pacific Air Command, United States Army (PACUSA), and its Air Forces were redeployed as follows:

Primary mission performing allied occupational assistance on the Japanese Home Islands and the Korean peninsula.
Returning to its prewar mission for the defense of the Hawaiian Islands, including Midway Island; the Marshall Islands and other Central Pacific islands
Defense of the Ryukyu Islands, including Iwo Jima
Defense of the Philippines, New Guinea and the Solomon Islands
Reassigned to PACUSA 6 December 1945; provided a strategic deterrent for the entire Western Pacific region

With this realignment and reassignment of forces, PACUSA controlled and commanded all United States Army Air Forces in the Far East and Southwest Pacific, and all air forces were placed under one Air Force commander for the first time.[7][8][9]

In November 1945, the 509th Composite Group left North Field on the island of Tinian and was reassigned to Roswell Army Air Field, New Mexico, taking the atomic bomb delivery capability of PACUSA to the United States. Shortly afterwards, Eighth Air Force was reassigned to the newly established Strategic Air Command (SAC) on 7 June 1946 and its strategic units reassigned to the 1st Bombardment Division.

The major mission of PACUSA in the postwar years (1946–1950) was occupation duty in Japan and the demilitarization of the Japanese society in conjunction with the United States Army. In addition, PACUSA helped to support atomic bomb testing in the Pacific Proving Grounds beginning with the Operation Crossroads test on Bikini Atoll in the Marshall Islands in 1946.

FEAF Emblem, 1954

With the impending establishment of the United States Air Force as an independent service later that year, PACUSA was redesignated Far East Air Forces (FEAF) on 1 January 1947. On that same date, Seventh Air Force in Hawaii was inactivated with its organization absorbed by HQ, FEAF.[10]

PACUSA/FEAF deployments to Korea prior to the 1948 partition of the country helped in the establishment of the Republic of Korea (e.g., South Korea), along with the transfer of surplus military equipment and other aid to French Indochina as well as aid to the Nationalist Chinese during the Chinese Civil War which resumed after the end of World War II (1945–1949).

Korean War


On 25 June 1950, the armed forces of the Democratic People's Republic of Korea (e.g., North Korea) invaded South Korea. On 27 June, the United Nations Security Council voted to assist the South Koreans in resisting the invasion. President Harry Truman authorized General of the Army Douglas MacArthur (commander of the US occupying forces in Japan) to commit units to the battle. MacArthur ordered General George E. Stratemeyer, CIC of FEAF, to attack attacking North Korean forces between the front lines and the 38th parallel.[11]

Order of Battle, June 1950

Despite the post-World War II demobilization of United States armed forces, the U.S. Air Force still had substantial forces in the Pacific to oppose the North Korean military. When the North Koreans crossed the 38th parallel on 25 June 1950, FEAF consisted of the following primary units*:[12][13][14]

  • Fifth Air Force (Japan)
Itazuke Air Base, Kyushu
8th Fighter-Bomber Wing/Group (F-80, F-82)
Johnson Air Base, Honshu
3d Bombardment Wing/Group (B-26)
Nagoya Air Base, Honshu
347th Fighter All Weather Wing/Group (inactivated 24 June 1950)
Tachikawa Air Base, Honshu
374th Troop Carrier Wing/Group (C-54)
Yokota Air Base, Honshu
35th Fighter-Interceptor Wing/Group (F-80, RF-80, F-82)
Misawa Air Base, Honshu
49th Fighter-Bomber Wing/Group (F-80)

  • Twentieth Air Force (Okinawa and the Marianas)
Naha Air Base, Okinawa
51st Fighter-Interceptor Wing/Group (F-80, F-82)
Kadena Air Base, Okinawa
31st Photo Reconnaissance Squadron, VLR** (RB-29)
Andersen Air Force Base, Guam
19th Bombardment Wing/Group (B-29)
  • Thirteenth Air Force (Philippines)
Clark Air Force Base, Luzon
18th Fighter-Bomber Wing/Group (F-80)
21st Troop Carrier Squadron (C-54)
6204th Photo Mapping Flight (RB-17)

At that time, the combat units of the FEAF were equipped with the Lockheed F-80 Shooting Star jet fighter, the North American F-82 Twin Mustang all-weather escort fighter, the Douglas B-26 Invader light attack bomber, the Lockheed RF-80A Shooting Star tactical reconnaissance aircraft, and the Boeing B-29 Superfortress heavy bomber. Support units were equipped with the Douglas C-54 Skymaster cargo aircraft and the Boeing RB-17 Flying Fortress, a former heavy bomber converted to photo mapping duties. FEAF personnel also trained, supported and flew with the fledgling Republic of Korea Air Force (ROKAF) under the Bout One Project, primarily operating excess World War II-vintage F-51D Mustang fighter aircraft transferred from USAF inventory, re-marked with ROKAF insignia, and operated in interdiction/ground attack and close air support roles.[15][16]

* Elements of the 2d and 3d Air Rescue squadrons, attached to FEAF by the Military Air Transport Service (MATS), were located at various bases where they could best perform emergency rescue services with their SB-17 Flying Fortresses. The 512th and 514th Weather Reconnaissance Squadrons of the 2143d Air Weather Wing were located at Yokota Air Base, Japan, and Andersen Air Force Base, Guam. All USAF units engaged in combat during the Korean War were under the overall command of Far East Air Forces.
** The 31st Photo Reconnaissance squadron was a Strategic Air Command (SAC) organization, attached to FEAF for operations. On 29 June 1950, the unit began flying combat missions over the Korean Peninsula in their RB-29 Superfortresses to provide FEAF Bomber Command with target and bomb-damage assessment photography.

In response to the threat posed by the introduction of Soviet-built (and often Soviet-manned) MiG-15 jet fighters into the Korean People's Air Force (KPAF), USAF F-80 and F-82 units were later re-equipped with the North American F-86 Sabre jet fighter between December 1951 and Spring 1953.[17] Eventually, these USAF F-86 units would establish a kill ratio of 10:1 versus their KPAF adversaries.

During the Korean War (1950–1953) FEAF's Fifth Air Force was the main United Nations combat air command until the Korean Armistice Agreement ended the combat 1953.

Cold War

C-124 at Hamilton AFB, California being prepared to load a Lockheed F-104 Starfighter being transported to Formosa, 1958.

With the 1953 Korean Armistice, the deployed SAC and TAC units to Japan and Korea were gradually withdrawn, and returned to the United States. Twentieth Air Force was inactivated on 1 March 1955, leaving FEAF with two Air Forces, the Fifth in Japan and the Thirteenth in the Philippines, although units were maintained on Guam and Okinawa.[12]

On 1 July 1954 The Pacific Air Force (PACAF) was activated at Hickam Air Force Base, Territory of Hawaii, and assigned to Far East Air Forces (FEAF), which was headquartered in Japan. Pacific Air Force at Hickam functioned primarily as the Air Force staff component and planning element of U.S. Pacific Command. On 1 July 1956, Pacific Air Force was redesignated Pacific Air Force/FEAF (Rear). Headquarters FEAF began preparations to move from Japan to Hawaii. Smith assumed additional responsibilities as deputy commander, Far East Air Forces. This was followed on 1 July 1957 with United States Far East Air Forces being redesignated Pacific Air Forces (PACAF) and transferring its headquarters to Hickam AFB, Territory of Hawaii.[12]

Tensions between the Communist Chinese on the mainland and the Nationalist Chinese on Taiwan dominated FEAF and PACAF during the mid and late 1950s. The 1954 and 1958 Taiwan Strait Crisis both threatened to break out into a war, and USAF F-104C units were deployed to Kung Kuan Air Base on Taiwan in 1958.[18] The question of "Matsu and Quemoy" became an issue in the 1960 American Presidential election when Richard Nixon accused John F. Kennedy of being unwilling to commit to using nuclear weapons if the People's Republic of China invaded the Nationalist outposts.[19]

By 1960, PACAF maintained a combat-ready deterrent force of some 35 squadrons, operating from 10 major bases in a half-dozen countries.[12]

Vietnam War

See also: United States Air Force in South Vietnam and United States Air Force In Thailand
F-4E of the 421st Tactical Fighter Squadron, Da Nang Air Base
Republic F-105F/G-1-RE Thunderchief, AF Ser. No. 63-8319 of Det 1, 561st Tactical Fighter (Wild Weasel) Squadron, Korat Royal Thai Air Force Base
North American F-100F-20-NA Super Sabre, AF Ser. No. 58-1213 of the 352d Fighter Squadron at Phan Rang Air Base, South Vietnam, 1971

In the early 1960s, communist military strength and firepower in Vietnam increased. As a result, PACAF began a buildup in the area with the addition of troops and better arms and equipment.

In response to what has become known as the Gulf of Tonkin incident in 1964, Tactical Air Command pilots and support personnel found themselves deployed from the CONUS to PACAF bases such as Da Nang Air Base and Phan Rang AB in South Vietnam. Bases in Thailand (Takhli RTAFB, Korat RTAFB) were also used by deployed TAC fighter squadrons.[20]

As the American effort in Southeast Asia increased, TAC permanently reassigned entire wings of aircraft from CONUS bases to PACAF and increased the number of rotated tactical fighter and reconnaissance squadrons on rotating Temporary Duty (TDY) commitments to PACAF bases in Vietnam and Thailand, along with units to South Korea, Japan and the Philippines. On a daily basis, flight crews would hurl themselves and their planes at targets across the area of operations over the skies of North and South Vietnam.[20]

At the height of the Vietnam War (1968), PACAF commanded forces at major air bases in the following countries:[21]

In 1962, PACAF activated the 2d Air Division to be the main warfighting organization in South Vietnam. As the conflict escalated, Seventh Air Force was activated on 1 April 1966, replacing 2d Air Force. PACAF units in Thailand were under the command of Thirteenth Air Force beginning in 1964, then in 1973 a joint Seventh/Thirteenth Air Force headquarters was established in Bangkok to direct PACAF forces in Thailand operating in Indochina (until 15 August 1973), and Thailand until the final USAF withdrawal from Southeast Asia in the beginning of 1976.[21][22]

Further information: Seventh Air Force

for the PACAF order of battle in South Vietnam

Further information: Thirteenth Air Force

for the PACAF order of battle in Thailand

By 1970, direct PACAF involvement the war was winding down as the conflict was being increasingly turned over to the South Vietnamese under the process known as Vietnamization. Units from the South Vietnamese Air Force (VNAF) took on more and more combat to defend their nation while PACAF tactical air strength was being reduced as several air bases were turned over to the VNAF. Combat aircraft of PACAF flew their last strikes in Cambodia 15 August 1973, writing the final chapter to the long and costly history of active American participation in the Indochina War. The Paris Peace Accords of 1973 ended PACAF's use of South Vietnamese bases, and by 1976 bases in Thailand were turned over to the Thai government. In 1979, normalization of relations with the People's Republic of China also led to the withdrawal of PACAF personnel from Ching Chuan Kang Air Base, Republic of China (Taiwan).[21]

Post Cold War

South Korea based 51st Fighter Wing F-16Cs in flight.

The post-Vietnam era found the command focusing on improving its readiness and PACAF's organizational structure saw a marked period of rapid and extensive changes. Inactivated at the end of the Vietnam War in 1975, Seventh Air Force was reactivated at Osan Air Base, South Korea in 1986 to take over Fifth Air Force activities in South Korea. Also in 1986, the Goldwater-Nichols Act reworked the overall command structure of the United States military. With the creation of Unified Combatant Commands (UCC) organized either on a geographical basis (known as "Area of Responsibility", AOR) or on a functional basis, Pacific Air Forces became a part of the United States Pacific Command (USPACOM).

Andersen AFB in Guam was reassigned from Strategic Air Command (SAC) to PACAF in 1989, and Eleventh Air Force became a part of the command in late 1990. In the late 1980s and early 1990s, civil unrest in the Philippines and negotiations with the extant government of the Republic of the Philippines for the lease of Clark Air Base, along with other U.S. military installations in the Philippines, had reached an impasse. However, following the volcanic eruption of Mount Pinatubo, the resultant damage to Clark AB, and with a post-Cold War desire by the U.S. Government to reduce defense spending, Clark AB was closed and Thirteenth Air Force relocated in 1991.[12]

In 1992, changes took place in force structure within PACAF as the command assumed control of theater-based tactical airlift wings, theater C-130 aircraft and crews, and associated theater C-130 support following the disestablishment of Military Airlift Command (MAC). PACAF also gained control of all operational support aircraft and all aeromedical airlift assets in the Pacific previously under the cognizance of MAC.[12] With the concurrent disestablishment of Strategic Air Command (SAC) and Tactical Air Command (TAC) the same year, PACAF also assumed responsibility for all active KC-135 aerial refueling aircraft based in Hawaii and Japan, "gaining command" responsibility for all Air National Guard KC-135 aircraft in Hawaii and Alaska, and all E-3 AWACS aircraft in Japan and Alaska.

Throughout its history PACAF has played a vital role in world events. In addition to its key combat role in World War II, Korea and Vietnam, PACAF units fought in Desert Storm in 1991 and continued to deploy to Saudi Arabia, Turkey and Italy for peacekeeping operations such as Operation Southern Watch and Operation Northern Watch. PACAF provided its expertise, aircraft, personnel and equipment to facilitate the new Expeditionary Air Force, especially as it applied to successful airbridge operations spanning the vast Pacific Ocean. Following the 11 September 2001 terrorist attacks on the United States, PACAF again demonstrated its intrepid spirit through its units deployed in support of Operation Noble Eagle, Operation Enduring Freedom and, in 2003, Operation Iraqi Freedom.[12]

Since 1944, the command has also participated in more than 140 humanitarian operations within its area of responsibility and beyond. In these operations PACAF people quickly and efficiently airlifted food, medicine and other supplies to areas devastated by storms, floods, earthquakes, volcanoes and other natural disasters.[12]

As PACAF entered the second decade of the 21st century, expanding theater challenges and simultaneous resource constraints have forced continuing innovation and adjustments by PACAF in order to meet mission requirements. Previously assigned four numbered air forces, PACAF downscoped to three numbered air forces in September 2012, inactivating 13th Air Force and merging its functions into PACAF. Base consolidations and infrastructure limitations have also required the Air Force and PACAF to developed increased capability while striving to remain within budgetary resource constraints. One such example has been the evaluation of alternate runway(s)/divert field(s) in the Marianas since late 2011 as a backup to Andersen AFB on Guam, a process that remains on-going as of 2014.[23][24]


Reestablished: Far East Air Forces on 3 August 1944
Activated on 3 August 1944
Redesignated: Pacific Air Command, United States Army, on 6 December 1945
Redesignated: Far East Air Forces on 1 January 1947
Redesignated Pacific Air Forces on 1 July 1957


Historical Operational Components



Air Forces

3 August 1944 – Present
14 July 1945 – 1 January 1947; 5 January 1955 – 1 July 1957; 1 April 1966 – 30 June 1975; 8 September 1986 – Present

Air Divisions



Current Operating Units

PACAF controls three Numbered Air Forces (NAF), which function as the senior war-fighting components of the command. These are:

18th WingKadena Air Base, Okinawa Prefecture, Japan
(F-15C/D, KC-135R, E-3B/C, (HH-60G)
NOTE: The 353d Special Operations Group is a tenant AFSOC unit at Kadena AB
with MC-130H and MC-130P aircraft, operating external to 5AF and PACAF
35th Fighter WingMisawa Air Base, Aomori Prefecture, Japan
374th Airlift WingYokota Air Base
(C-130H, C-12J, UH-1N)
605th Air Operations Group – Yokota Air Base
8th Fighter WingKunsan Air Base, Jeollabuk-do, South Korea
51st Fighter WingOsan Air Base
(A-10/OA-10, F-16CG/DG, C-12)
607th Air and Space Operations CenterOsan Air Base
607th Air Support Group – Osan Air Base
607th Air Support Operations Group – Osan Air Base
607th Support Group – Osan Air Base

3d WingElmendorf Air Force Base
(F-22A, C-130H, E-3B, C-17A)
354th Fighter WingEielson AFB, Alaska
611th Air and Space Operations CenterJoint Base Elmendorf-Richardson
611th Air Support GroupJoint Base Elmendorf-Richardson
15th WingJoint Base Pearl Harbor-Hickam
(F-22A, C-17A, C-37B, C-40A)
13th Air Expeditionary GroupJoint Base Pearl Harbor-Hickam (Seasonal)
36th WingAndersen AFB
(Hosts rotational ACC B-1B and AFGSC B-2A and B-52H aircraft; no permanent aircraft assigned)
613th Air and Space Operations CenterJoint Base Pearl Harbor-Hickam
613th Support Group – Joint Base Pearl Harbor-Hickam

PACAF also has operational "gaining command" responsibility for several Air Reserve Component (ARC) units, personnel and aircraft in the Air Force Reserve Command (AFRC) and the Air National Guard (ANG). These are:

Air Force Reserve Command

477th Fighter Group - Joint Base Elmendorf-Richardson
AFRC Associate unit of 3d Wing
624th Regional Support Group - Joint Base Pearl Harbor-Hickam and Andersen AFB
(No aircraft assigned)
701st Combat Operations Squadron - March Air Reserve Base and 701st Combat Operations Squadron, Det 1 - Joint Base Pearl Harbor-Hickam
(No aircraft assigned)

Alaska Air National Guard

176th Wing - Joint Base Elmendorf-Richardson
(C-17A, C-130H, HC-130P, HH-60G)
168th Air Refueling Wing - Eielson Air Force Base

Guam Air National Guard

254th Air Base Group - Andersen Air Force Base
(No aircraft assigned)

Hawaii Air National Guard

154th Wing - Joint Base Pearl Harbor-Hickam
(F-22A, KC-135R, C-17A)
109th Air Operations Group - Joint Base Pearl Harbor-Hickam
(No aircraft assigned)
201st Combat Communications Group - Joint Base Pearl Harbor-Hickam
(No aircraft assigned)

Missouri Air National Guard

157th Air Operations Group - Jefferson Barracks National Guard Base
(No aircraft assigned)

See also


  2. Griffith 1998, pp. 174–175.
  3. Stephens 2001, pp. 168–170.
  4. Kenney 1949, pp. 537–538.
  5. The United States Far East Air Forces was a separate command from the World War II Far East Air Force (United States) (28 October 1941 – 5 February 1942) which fought in the Philippine and Dutch East India campaigns. Initially it was composed mostly of aircraft and personnel from the Philippine Army Air Corps. It was largely destroyed during the Battle of the Philippines (1941–42) and the surviving personnel and aircraft were later reorganized in Australia as the U.S. Fifth Air Force.
  6., PACAF History Fact Sheet
  7. Chronology of the Occupation
  8. Army Air Forces in World War II Vol. VII: Services Around the World CHAPTER 17 REDEPLOYMENT AND DEMOBILIZATION
  9. USAF Historical Research Agency
  10. PACAF page, AFHRA
  11. American Caesar, Douglas MacArthur 1880–1964, William Manchester, Little, Brown, 1978.
  12. 1 2 3 4 5 6 7 8 Air Force Historical Research Agency PACAF History Factsheet
  13. Final Cut: The Postwar B-17 Flying Fortress: The Survivors, Scott A. Thompson, Pictorial Histories Publishing Company, 1993.
  14. Ravenstein, Charles A. (1984). Air Force Combat Wings Lineage and Honors Histories 1947–1977. Maxwell AFB, Alabama: Office of Air Force History. ISBN 0-912799-12-9
  15. Dean Hess
  16. Bout One
  18. Second Taiwan Strait Crisis Quemoy and Matsu Islands
  19. 1960 Presidential Debates @
  20. 1 2 Futrell, Robert F. with the assistance of Blumenson, Martin (1991) The United States Air Force in Southeast Asia: The Advisory Years to 1965, Office Of Air Force History, United States Air Forceriority in Korea. Annapolis: U.S. Naval Institute Press, 2005. ISBN 1-59114-933-9.
  21. 1 2 3 Schlight, John (1996) A War Too Long: The History of the USAF in Southeast Asia, 1961–1975, Office Of Air Force History, United States Air Force
  22. Glasser, Jeffrey D. (1998). The Secret Vietnam War: The United States Air Force in Thailand, 1961–1975. McFarland & Company. ISBN 0-7864-0084-6.
  23. Kelman, Brett. "AF seeks backup runway in western Pacific." Pacific Daily News, 11 October 2011.


 This article incorporates public domain material from the Air Force Historical Research Agency website

  • This article includes content from Pacific Air Forces website, which as a work of the U.S. Government is presumed to be a public domain resource. That information was supplemented by:
  • Endicott, Judy G. (1999) Active Air Force wings as of 1 October 1995; USAF active flying, space, and missile squadrons as of 1 October 1995. Maxwell AFB, Alabama: Office of Air Force History. CD-ROM
  • Fletcher, Harry R. (1989) Air Force Bases Volume II, Active Air Force Bases outside the United States of America on 17 September 1982. Maxwell AFB, Alabama: Office of Air Force History. ISBN 0-912799-53-6
  • Ravenstein, Charles A. (1984). Air Force Combat Wings Lineage and Honors Histories 1947–1977. Maxwell AFB, Alabama: Office of Air Force History. ISBN 0-912799-12-9.
  • Rogers, Brian (2005). United States Air Force Unit Designations Since 1978. Hinkley, England: Midland Publications. ISBN 1-85780-197-0.
  • USAAS-USAAC-USAAF-USAF Aircraft Serial Numbers—1908 to present
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