EXPEDITIONARY TROOPS
Commanding General	Maj. Gen. Julian C. Smith
Chief of Staff	Col. Dudley S. Brown
F-1	Col. Harry E. Dunkelberger
F-2	Lt. Col. Edmund J. Buckley
F-3	Col. Robert O. Bare
F-4	Lt. Col. Jessee S. Cook, Jr.
7th Antiaircraft Artillery Battalion1
Commanding Officer	Lt. Col. Henry R. Pale
Executive Officer	Lt. Col. Elmer C. Woods
Bn-3	Capt. Hugh J. Irish
III AMPHIBIOUS CORPS
Commanding General	Maj. Gen. Roy S. Geiger
Chief of Staff	Col. Merwin H. Silverthorn
C-1	Lt. Col. Peter A. McDonald
C-2	Col. William F. Coleman
C-3	Col. Walter A. Wachtler
C-4	Col. Francis B. Loomis, Jr.
CORPS TROOPS
1st Amphibian Tractor Battalion
Commanding Officer	Maj. Albert F. Reutlinger (To 21 September) Capt. Arthur J. Noonan (From 22 September)
Executive Officer	Capt. Thomas H. Boler (From 23 September)
Bn-3	1st Lt. Norman H. Bryant
6th Amphibian Tractor Battalion
Commanding Officer	Capt. John I. Fitzgerald, Jr.
Executive Officer	1st Lt. Whitley A. Cummings, Jr.2

8th Amphibian Tractor Battalion
Commanding Officer	Lt. Col. Charles B. Nerren
Executive Officer	Maj. Bedford Williams
Bn-3	1st Lt. John R. Tull
3d Armored Amphibian Battalion
Commanding Officer	Lt. Col. Kimber H. Boyer
Executive Officer	Maj. Arthur M. Parker, Jr.
Bn-3	1st Lt. Marvin E. Mitchell
12th Antiaircraft Artillery Battalion
Commanding Officer	Lt. Col. Merlyn D. Holmes
Executive Officer	Lt. Col. Edwin A. Law (To 18 October) Lt. Col. Kenneth A. King (From 19 October)
Bn-3	Maj. Joseph R. Jacyno (To 10 October) Capt. Whitman S. Bartley (11-25 October) Capt. Henry H. McUmber, Jr. (From 28 October)
3d 155mm Howitzer Battalion
Commanding Officer	Lt. Col. Richard A. Evans
Executive Officer	Maj. Lewis A. Jones (To 25 October) Maj. Hunter C. Phelan, Jr. (From 26 October)
Bn-3	Maj. Daniel S. Pregnall
8th 155mm Gun Battalion
Commanding Officer	Maj. George V. Hanna, Jr.
Executive Officer	Maj. Robert F. Meldrun
Bn-3	Maj. Hunter C. Phelan, Jr. (To 25 October)
1st MARINE DIVISION
Commanding General	Maj. Gen. William H. Rupertus
Assistant Division Commander	Brig. Gen. Oliver P. Smith
Chief of Staff	Col. John T. Selden
D-1	Maj. William E. Benedict (To 23 September) Lt. Col. Harold O. Deakin (From 24 September)
D-2	Lt. Col. John W. Scott, Jr.
D-3	Lt. Col. Lewis J. Fields
D-4	Lt. Col. Harvey C. Tschirgi
Division Headquarters Battalion
Commanding Officer	Col. Joseph F. Hankins3 (To 3 October) Lt. Col. Austin C. Shofner (From 3 October)
1st Tank Battalion
Commanding Officer	Lt. Col. Arthur J. Stuart
Executive Officer	Maj. Donald J. Robinson
Bn-3	1st Lt. Ernest A. Hayden, Jr.
1st Service Battalion
Commanding Officer	Col. John Kaluf
Executive Officer	Maj. Charles F. Rider

1st Motor Transport Battalion
Commanding Officer	Capt. Robert B. McBroom
Executive Officer	Capt. George G. DeBell
Bn-3	1st Lt. Walter M. Greenspan
1st Pioneer Battalion
Commanding Officer	Lt. Col. Robert G. Ballance
Executive Officer	Maj. Nathaniel Morgenthal
Bn-3	Capt. Warren S. Sivertsen
1st Engineer Battalion
Commanding Officer	Lt. Col. Levi W. Smith, Jr.
Executive Officer	Maj. Theodore E. Drummond
Bn-3	Maj. Eugene T. Schoenfelder
1st Medical Battalion
Commanding Officer	Comdr. (MC) Emil E. Napp
1st Marines
Commanding Officer	Col. Lewis B. Puller
Executive Officer	Lt. Col. Richard P. Ross, Jr.
R-1	1st Lt. Frank C. Sheppard
R-2	Capt. James W. Horton
R-3	Maj. Bernard T. Kelly
R-4	Maj. Francis T. Eagan
1st Bn, 1st Marines
Commanding Officer	Maj. Raymond G Davis
Executive Officer	Maj. Nikolai S. Stevenson
Bn-3	Capt. James M. Rogers
2d Bn, 1st Marines
Commanding Officer	Lt. Col. Russell E. Honsowetz
Executive Officer	Maj. Charles H. Brush, Jr.
Bn-3	Capt. Robert W. Burnette (To 18 September) 1st Lt. Bernard J. Baker (From 19 September)
3d Bn, 1st Marines
Commanding Officer	Lt. Col. Stephen V. Sabol
Executive Officer	Maj. William McNulty
Bn-3	Maj. Jonas M. Platt
5th Marines
Commanding Officer	Col. Harold D. Harris
Executive Officer	Lt. Col. Lewis W. Walt
R-1	Capt. Alan F. Dill (To 16 September) Capt. Paul H. Douglas (From 16 September)
R-2	Capt. Levi T. Burcham
R-3	Maj. Walter S. McIlhenny (To 16 September) Capt. Donald A. Peppard (From 17 September)
R-4	Maj. Joseph S. Skoczylas (To 30 September)
1st Bn, 5th Marines
Commanding Officer	Lt. Col. Robert W. Boyd
Executive Officer	Maj. Harold T. A. Richmond
Bn-3	Maj. Hierome L. Opie, Jr. (To 15 September)

	Capt. Edwin B. Glass (From 16 September)
2d Bn, 5th Marines
Commanding Officer	Maj. Gordon D. Gayle
Executive Officer	Maj. John H. Gustafson (to 15 September) Maj. Richard T. Washburn (From 16 September)
Bn-3	Maj. Richard T. Washburn (To 15 September) Capt. James H. Flagg (From 16 September)
3d Bn, 5th Marines
Commanding Officer	Lt. Col. Austin C. Shofner (To 15 September) Lt. Col. Lewis W. Walt (Night 15/16 September) Maj. John H. Gustafson (From 16 September)
Executive Officer	Maj. Robert M. Ash (To 15 September) Maj. Hierome L. Opie (From 16 September)
Bn-3	Maj. Clyde A. Brooks
7th Marines
Commanding Officer	Col. Herman H. Hanneken
Executive Officer	Lt. Col. Norman Hussa
R-1	2d Lt. Richard F. Spindler
R-2	Capt. Francis T. Farrell
R-3	Maj. Walter Holomon
R-4	Maj. Hector R. Migneault
1st Bn, 7th Marines
Commanding Officer	Lt. Col. John J. Gormely
Executive Officer	Maj. Waite W. Worden
Bn-3	Maj. Lloyd W. Martin
2d Bn, 7th Marines
Commanding Officer	Lt. Col. Spencer S. Berger
Executive Officer	Maj. Elbert D. Graves (To 20 September) Maj. John F. Weber (From 21 September)
Bn-3	Maj. John F. Weber (To 20 September) Capt. Lee W. Langham (From 21 September)
3d Bn, 7th Marines
Commanding Officer	Maj. E. Hunter Hurst
Executive Officer	Maj. Victor H. Streit
Bn-3	Maj. William J. King
11th Marines
Commanding Officer	Col. William H. Harrison
Executive Officer	Lt. Col. Edson L. Lyman
R-1	1st Lt. Robert M. Alderson
R-2	Capt. Richard W. Payne (To 24 September) 2d Lt. Ralph W. Smith (From 25 September)
R-3	Lt. Col. Leonard F. Chapman, Jr.
R-4	Capt. Lewis F. Treleaven

1st Bn, 11th Marines
Commanding Officer	Lt. Col. Richard W. Wallace
Executive Officer	Maj. James H. Moffatt, Jr.
Bn-3	Maj. John R. Chaisson
2d Bn, 11th Marines
Commanding Officer	Lt. Col. Noah P. Wood, Jr.
Executive Officer	Maj. Floyd C. Maner (To 15 September) Maj. John P. McAlinn (From 16 September)
Bn-3	Capt. David R. Griffin
3d Bn, 11th Marines
Commanding Officer	Lt. Col. Charles M. Nees
Executive Officer	Maj. William J. Hannan
Bn-3	Capt. William R. Miller
4th Bn, 11th Marines
Commanding Officer	Lt. Col. Louis C. Reinberg
Executive Officer	Maj. George E. Bowdoin
Bn-3	Maj. Elliott Wilson

Footnotes

1. This was a VAC unit which landed on Angaur on 21 Sept and remained as part of the garrison.

2. Lt Cummings served also as Bn-3 as additional duty.

3. Col Hankins was killed in action on date indicated. He served concurrently as Division Provost Marshall, as did his successor.