545th Fighter Squadron

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545th Fighter Squadron
Bell P-39 Airacobra.jpg
Bell P-39 Airacobra as flown by the 546th Fighter Squadron
Country  United States
Branch United States Army Air Forces
Role Fighter Training

The 545th Fighter Squadron is a disbanded United States Air Force unit. Its last assignment was to the 478th Fighter Group at Portland Army Air Base, Oregon, where it was disbanded on 31 March 1944. During World War II the squadron served as a Bell P-39 Airacobra replacement training unit.


The squadron was first activated in late 1943 as the 545th Fighter Squadron (Twin Engine) at Hamilton Field, California.[1] It was one of the four original squadrons of the 478th Fighter Group,[2] which drew its original cadre from the 328th Fighter Group.[3]

The squadron moved twice in the first two months of its existence, to Santa Rosa Army Air Field in December 1943, and to Redmond Army Air Field in February 1944 as its parent group dispersed its component squadrons to separate bases in California, Oregon, and Washington.[1][4]

The group and squadron experienced delays and were not fully manned or equipped until March 1944, when they began operations as a Replacement Training Unit (RTU) using single engine Bell P-39 Airacobras despite their designation as a two engine units.[2] RTUs were oversized units whose mission was to train individual pilots or aircrews prior to their deployment to combat theaters.[5] However, the Army Air Forces found that standard military units, based on relatively inflexible tables of organization were proving less well adapted to the training mission. Accordingly, a more functional system was adopted in which each base was organized into a separate numbered unit,[6] while the groups and squadrons acting as RTUs were disbanded or inactivated.[7] The squadron moved to Portland Army Air Base in late March 1944,[1] where it was replaced, along with other units at Portland, by the 432d AAF Base Unit (Fighter Replacement Training Unit, Single Engine), which absorbed its mission, personnel and equipment.[3]


  • Constituted as the 546th Fighter Squadron (Twin Engine) on 12 October 1943
Activated on December 1943
Disbanded on 31 March 1944[1]


  • 478th Fighter Group, 1 December 1943 - 31 March 1944[1]


  • Hamilton Field, California, 1 December 1943
  • Santa Rosa Army Air Field, California, 12 December 1943
  • Redmond Army Air Field, Oregon, 3 February 1944
  • Portland Army Air Base, Oregon, 29 March 1944 - 31 March 1944[1]


  • Bell P-39 Airacobra, 1944[1]



  1. ^ a b c d e f g Maurer, Maurer, ed. (1982) [1969]. Combat Squadrons of the Air Force, World War II (PDF) (reprint ed.). Washington, DC: Office of Air Force History. p. 649. ISBN 0-405-12194-6. LCCN 70605402. OCLC 72556. 
  2. ^ a b Maurer, Maurer, ed. (1983) [1961]. Air Force Combat Units of World War II (PDF) (reprint ed.). Washington, DC: Office of Air Force History. p. 350. ISBN 0-912799-02-1. LCCN 61060979. 
  3. ^ a b Abstract, History 478 Fighter Group Dec 1943-Mar 1944 Retrieved December 11, 2013
  4. ^ Maurer, Combat Squadrons, pp. 569, 648, 650
  5. ^ Craven, Wesley F; Cate, James L, eds. (1955). "Introduction". The Army Air Forces in World War II. Vol. VI, Men & Planes. Chicago, IL: University of Chicago Press. p. xxxvi. LCCN 48-3657. 
  6. ^ Craven & Cate, The Organization and its Responsibilities, Chapter 2 The AAF, p. 75
  7. ^ Maurer, Combat Units, p. 7


 This article incorporates public domain material from websites or documents of the Air Force Historical Research Agency.

See also[edit]