The Organization of the B-29s in the Marianas Island
In the Marianas, there were five very heavy bombardment wings organized under the XXI Bomber Command of the 20th Air Force. The XXI Bomber Command was initially led by Brigadier General Haywood Hansell, but later Major General Curtis LeMay took over command of the XXI Bomber Command. Gen LeMay had commanded the XX Bomber Command in the China-Burma-India (CBI) theater.
The five wings and their bases were:
58th Bombardment Wing (VH), Originally part of the XX Bomber Command in the CBI Theater, they later moved to West Field, Tinian
73rd Bombardment Wing (VH), Isely Field, Saipan
313th Bombardment Wing (VH), North Field, Tinian
314th Bombardment Wing (VH), North Field, Guam
315th Bombardment Wing (VH), Northwest Field, Guam
In July of 1945, the XXI Bomber Command was de-activated and the wings fell directly under the command of the U.S. Strategic Air Forces in the Pacific. General Carl Spaatz was the commander of the U.S. Strategic Air Forces in the Pacific in the Marianas. Major General LeMay became the Chief of Staff of the U.S. Strategic Air Forces in the Pacific.
The following table shows the wings, groups and squadrons of the Marianas:
World War II – B-29 Wings, Groups and Squadrons
| XXI Bomber Command/20th Air Force | XXI Bomber Command/20th Air Force | XXI Bomber Command/20th Air Force | XXI Bomber Command/20th Air Force | XXI Bomber Command/20th Air Force |
| 58th Bomb Wing | 73rd Bomb Wing | 313th Bomb Wing | 314th Bomb Wing | 315th Bomb Wing |
| XX Bomber Command India, then West Field, Tinian | Isley Field, Saipan | North Field, Tinian | North Field, Guam | NW Field Guam |
| 40th Bomb Gp | 497th Bomb Gp | 6th Bomb Gp | 19th Bomb Gp | 16th Bomb Gp |
| 25thBomb Sq | 869th Bomb Sq | 24th Bomb Sq | 28th Bomb Sq | 15th Bomb Sq |
| 44th Bomb Sq | 870th Bomb Sq | 39th Bomb Sq | 30th Bomb Sq | 16th Bomb Sq |
| 45th Bomb Sq | 871st Bomb Sq | 40th Bomb Sq | 93rd Bomb Sq | 17th Bomb Sq |
| 395th Bomb Sq | 872nd Bomb Sq | |||
| 444th Bomb Gp | 498th Bomb Gp | 9th Bomb Gp | 29th Bomb Gp | 331st Bomb Gp |
| 676th Bomb Sq | 873rd Bomb Sq | 1st Bomb Sq | 6th Bomb Sq | 355th Bomb Sq |
| 677th Bomb Sq | 874th Bomb Sq | 5th Bomb Sq | 43rd Bomb Sq | 356th Bomb Sq |
| 678th Bomb Sq | 875th Bomb Sq | 99th Bomb Sq | 52nd Bomb Sq | 357th Bomb Sq |
| 679th Bomb Sq | 876th Bomb Sq | |||
| 462nd Bomb Gp | 499th Bomb Gp | 504th Bomb Gp | 39th Bomb Gp | 501st Bomb Gp |
| 768th Bomb Sq | 877th Bomb Sq | 398th Bomb Sq | 60th Bomb Sq | 21st Bomb Sq |
| 769th Bomb Sq | 878th Bomb Sq | 421st Bomb Sq | 61st Bomb Sq | 41st Bomb Sq |
| 770th Bomb Sq | 879th Bomb Sq | 680th Bomb Sq | 62nd Bomb Sq | 485th Bomb Sq |
| 771st Bomb Sq | 880th Bomb Sq | |||
| 468th Bomb Gp | 500th Bomb Gp | 505th Bomb Gp | 330th Bomb Gp | 502nd Bomb Gp |
| 792nd Bomb Sq | 881st Bomb Sq | 482nd Bomb Sq | 457th Bomb Sq | 402nd Bomb Sq |
| 793rd Bomb Sq | 882nd Bomb Sq | 483rd Bomb Sq | 458th Bomb Sq | 411th Bomb Sq |
| 794th Bomb Sq | 883rd Bomb Sq | 484th Bomb Sq | 459th Bomb Sq | 430th Bomb Sq |
| 795th Bomb Sq | 884th Bomb Sq | |||
|
509th Composite Group Based with the 313th Bomb Wing |
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| 393rd Bomb Sq |