It was last assigned to the 380th Bombardment Wing, based at Plattsburgh AFB, New York. It was inactivated on 1 January 1962.

531st Bombardment Squadron, Medium
531st Bombardment Squadron - Emblem.png
Emblem of the 531st Bombardment Squadron
CountryUnited States
BranchUnited States Air Force
Part ofUnited States Air Force/Strategic Air Command
Garrison/HQPlattsburgh Air Force Base
EngagementsWorld War II
Korean war



World War IIEdit

Established in late 1942 as a B-24 Liberator heavy bomb squadron; trained under Second Air Force in Texas, and later in Colorado. Deployed to the Southwest Pacific Area (SPA) in April 1943, being assigned to Fifth Air Force in Australia.

From airfields in Australia, the squadron reached out to the Japanese installations in the Netherlands East Indies. Moved to the Philippines where the squadron operated in early 1945, then to Okinawa where combat operations ended after the Japanese Capitulation in August. After the war, squadron personnel were demobilized and returned to the United States, the B-24s sent to reclamation in the Philippines. Inactivated as a paper unit in early 1946.


In 1947, the squadron was reactivated as a reserve unit of the Strategic Air Command at MacDill Field, Florida. The squadron remained an inactive reserve unit until 1951 when the squadron was inactivated.

Activated as a B-29 Superfortress squadron in the reserves, 1947. Not manned or equipped, inactivated in 1949 due to budget reductions.

Strategic Air CommandEdit

From 1958, the Boeing B-47 Stratojet wings of Strategic Air Command (SAC) began to assume an alert posture at their home bases, reducing the amount of time spent on alert at overseas bases. The SAC alert cycle divided itself into four parts: planning, flying, alert and rest to meet General Thomas S. Power’s initial goal of maintaining one third of SAC’s planes on fifteen minute ground alert, fully fueled and ready for combat to reduce vulnerability to a Soviet missile strike.[1] To implement this new system B-47 wings reorganized from three to four squadrons.[1][2] The 531st was activated at Plattsburgh Air Force Base as the fourth squadron of the 380th Bombardment Wing. The alert commitment was increased to half the squadron's aircraft in 1962 and the four squadron pattern no longer met the alert cycle commitment, so the squadron was inactivated on 1 January 1962.[2]


  • Constituted 531st Bombardment Squadron (Heavy) on 28 October 1942
Activated on 3 November 1942
Inactivated on 20 February 1946
  • Redesignated 531st Bombardment Squadron (Very Heavy) on 13 May 1947
Activated in the reserve on 29 May 1947
Redesignated 531st Bombardment Squadron (Medium) on 26 June 1949
Ordered to active service on 1 May 1951
Inactivated on 16 May 1951
  • Activated on 1 May 1959
Discontinued, and inactivated, on 1 January 1962.


Attached to: Royal Australian Air Force, 28 April 1943 - 1 March 1945
  • Fourteenth Air Force, 29 May 1947
  • 380th Bombardment Group, 16 June 1947 – 16 May 1951
  • 380th Bombardment Wing, 1 May 1959 – 1 January 1962.



Operational historyEdit

Combat in Southwest and Western Pacific, c. 21 May 1943 – 24 July 1945. Reserve B-29 squadron, activated during Korean War. Aircraft and personnel reassigned to other active duty squadrons then squadron inactivated w/o/p/e. SAC Medium bomber (B-47) squadron (1959–1962).

See alsoEdit


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

  1. ^ a b Schake, p. 220 (note 43)
  2. ^ a b "Abstract (Unclassified), History of the Strategic Bomber since 1945 (Top Secret, downgraded to Secret)". Air Force History Index. 1 April 1975. Retrieved March 4, 2014.

External linksEdit