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United States' Squadron and Group Codes, 400-499

Code Squadron Group Air Force Notes Aircraft
LL1 401st BS1 91st BG1 8th1    
9D1 401st FS1 370th FG1 9th1    
E61 402nd FS1 370th FG1 9th1    
  403rd BS6,12 43rd BG6,12 5th6, V Army Air Force12 South West Pacific6, Bismarck Sea12 B-17F6, B-1712
9Q1 404th FS1 371st FG1 9th1    
  405h BS12 38th BG12 V Army Air Force12 Bismarck Sea12 B-2512
8N1 405th FS1 371st FG1 9th1    
J61 406th BS1   8th1    
4W1 406th FS1 371st FG1 9th1    
PY1 407th BS1 92nd BG1 8th1    
YM1 409th BS1 93rd BG1 8th1    
GL1 410th BS1 94th BG1 8th1    
R31 410th FS1 373rd FG1 9th1    
U91 411th FS1 373rd FG1 9th1    
QW1 412th BS1 95th BG1 8th1    
V51 412th FS1 373rd FG1 9th1    
MZ1 413th BS1 96th BG1 8th1    
  VMB-4139     South West Pacific9; Stirling Island9 PBJ-1D9
  414th BS5,10 97th BG (Heavy)5,10 12th10, Northwest African Strategic10 Chateaudun-du-Rhumel, Algeria5; Depienne, Tunisia5; Tunisia10; Amendola, Italy5; B-17E10, B-17F5, B-17G5
  414th NFS7     Europe7
Kills: 57
P-617
  415 BS10 98th BG (Heavy)10 IX Bomber Command10, 9th Air Force10
US Army Middle East10
  B-2410
  415th NFS7       P-617
  416th BS10 99th BG (Heavy)10 Nothwest African Strategic10 Tunisia10 B-17F10
  416th BS11   9th11   A-26 Invader11
  416th NFS3,7     Meditteranean3; Pontedera, Italy3 P-70 Havoc3, Beaufighter3, Mosquito XXX3, A-363, P-617
  417th NFS3,7     Corsica3 Beaufighter VIF3, P-617
LD1 418th BS1 100th BG1 8th1    
  418th NFS3,7     Philippines3, Pacific7
Kills: 187
B-25H3, P-61B3,7
  419th BS10 301st BG (Heavy)10 12th10, Northwest African Strategic10 Tunisia10 B-17F10
  419th NFS7     Pacific7
Kills: 57
P-617
  421st NFS7     Pacific7
Kills: 137
P-617
JJ1 422nd BS1 305th BG1 8th1    
  422nd NFS3,7     Ford, Britain3; Etain, France3; Florennes, Belgium3; Europe7
Kills: 437
P-61A3,7
RD1 423rd BS1 306th BG1 8th1    
  VMB-4239     Green Island9 PBJ-1D9
  425th NFS3,7     Great Britain3, Europe7
Kills: 107
P-613,7
  426th NFS7     Pacific7
Kills: 57
P-617
  427th NFS7       P-617
GN1 427th BS1 303rd BG1 8th1    
  428th BS4,10 310th BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10, Mediterranean4 B-254, B-25C10
F51 428th FS1 474th FG1 9th1    
  429th BS5,10 2nd BG (Heavy)5,10 Northwest African Strategic10 Tunisia10; Amendola, Italy5 B-27E10, B-17G5
7Y1 429th FS1 474th FG1 9th1    
K61 430th FS1 474th FG1 9th1    
  431st BS6 11th BG6 13th6 South Pacific6 B-17E6
  432nd BS10 17th BG (Medium)10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10 B-26B10
  VMB-4339     South West Pacific9 PBJ-1D9, PBJ-1J9
  434th BS4,10 12th BG4,10 Western Desert10 Mediterranean4
Planes numbered 76 - 1004
B-254,10
L21 434th FS1 479th FG1 8th1    
  435th BS6 19th BG6 5th6   B-176
J21 435th FS1 479th FG1 8th1    
9B1 436th FS1 479th FG1 8th1    
  437th BS4,10 319th BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 1 - 244
B-254, B-26B10
  438th BS4,10 319th BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 25 - 494
B-254, B-26B10
  439th BS4,10 319th BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 50 - 744
B-254, B-26B10
  440th BS4,10 319th BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 75 - 1004
B-254, B-26B10
  441st BS10 320th BG (Medium)10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10 B-26B10
  442nd BS10 320th BG (Medium)10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10 B-26B10
  443rd BS10 320th BG (Medium)10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10 B-26B10
  VMB-4439        
  444th BS10 320th BG (Medium)10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10 B-26B10
  445th BS4,10 321st BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 1 - 254
B-254, B-25C10
  446th BS4,10 321st BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 26 - 504
B-254, B-25C10
  447th BS4,10 321st BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 51 - 754
B-254, B-25C10
  448th BS4,10 321st BG (Medium)4,10, 47th Medium Bombardment Wing10 12th10, Northwest African Strategic10 Tunisia10; Mediterranean4
Planes numbered 76 - 1004
B-254, B-25C10
PN1 449th BS1 322nd BG1 9th1    
PN1 450th BS1 332nd BG1 8th1    
ER1 450th BS1 322nd BG1 9th1    
SS1 451st BS1 322nd BG1 9th1    
ER1 451st BS1 332nd BG1 8th1    
SS1 451st BS1 332nd BG1 8th1    
  VMF-4518       F4U8
DR1 452nd BS1 322nd BG1 9th1    
DR1 452nd BS1 332nd BG1 8th1    
  VMF-4528       F4U8
VT1 453rd BS1 323rd BG1 9th1    
VT1 453rd BS1 323rd BG1 8th1    
RJ1 454th BS1 323rd BG1 9th1    
  VMSB-4548     San Diego, California8; El Toro, California8 SB2C-1A8
YU1 455th BS1 323rd BG1 9th1    
YU1 455th BS1 323rd BG1 8th1    
WT1 456th BS1 323rd BG1 8th1    
WT1 456th BS1 323rd BG1 9th1    
  VMSB-4648     El Toro, California8 SB2C-48, SB2C-4E8
  VMSB-4748     El Toro, California8 SB2C-48
  481st NF OTU3     Orlando, Florida3 P-70 Havoc3
  VMSB-4848     El Toro, California8 SB2C-48, SB2C-4E8
7F1 485th FS1 370th FG1 9th1    
  486th BS4 340th BG4   Mediterranean4
Planes numbered 6A - 6Z4
B-254
PZ1 486th FS1 352nd FG1 8th1    
  487th BS4 340th BG4   Mediterranean4
Planes numbered 7A - 7Z4
B-254
HO1 487th FS1 352nd FG1 8th1    
  4887th BS4 340th BG4   Mediterranean4
Planes numbered 8A - 8Z4
B-254
  489th BS4 340th BG4   Mediterranean4
Planes numbered 9A - 9Z4
B-254
F41 492nd FS1 387th FG1 9th1    
I71 493rd FS1 48th FG1 9th1    
K91 494th BS1 344th BG1 9th1    
6M1 494th FS1 48th FG1 9th1    
Y51 495th BS1 344th BG1 9th1    
N31 496th BS1 344th BG1 9th1    
7I1 497th BS1 344th BG1 9th1    
  • BG: Bomber Group
  • BS: Bomber Squadron
  • FG: Fighter Group
  • FS: Fighter Squadron
  • NF: Night Fighter
  • NFS: Night Fighter Squadron
  • OTU: Operational Training Unit
  • PG: Pathfinder Group
  • PS: Pathfinder Squadron
  • RG: Reconnaissance Group
  • RS: Reconnaissance Squadron
  • TCG: Troop Carrier Group
  • TCS: Troop Carrier Squadron
  • TRG: Training Group
  • TRS: Training Squadron
  • VF(N): Navy Night Fighter Squadron
  • VMF(N): Marine Corps Night Fighter Squadron

Sources:

  1. USAAF Handbook 1939 - 1945, Martin W. Bowman, 1997
  2. Mosquito Photo-Reconnaissance Units of World War 2, Martin Bowman, 1999
  3. American Nightfighter Aces of World War 2, Andrew Thomas, Warren Thompson, 2008
  4. B-25 Mitchell Units of the MTO, Steve Pace, 2002
  5. B-17 Flying Fortress Units of the MTO, William N Hess, 2003
  6. B-17 Flying Fortress Units of the Pacific War, Martin Bowman, 2003
  7. P-61 Black Widow Units of World War 2, Warren Thompson, 2000
  8. Helldiver Units of World War 2, Barrett Tillman, 1997
  9. PBJ Mitchell Units of the Pacific War, Jerry Scutts, 2003
  10. The North African Air Campaign, Christopher Rein, 2012
  11. American Attack Aircraft Since 1926, E. R. Johnson, 2012
  12. Breaking the Bismarcks Barrier 22 July 1942 - 1 May 1944, Samuel Eliot Morison, 1950
20th Century American Military History Crucial Site