Expeditionary TroopsCommanding General LtGen Holland M. Smith Chief of Staff BrigGen Graves B. Erskine G-1 LtCol Albert F. Metze G-2 Col St. Julien R. Marshall G-3 Col John C. McQueen G-4 Col Raymond E. Knapp G-5 Col Joseph T. Smith
Northern Troops and Landing ForceCommanding General MajGen Harry Schmidt Chief of Staff BrigGen Graves B. Erskine G-1 LtCol Albert F. Metze G-2 LtCol Thomas R. Yancey (USA) G-3 Col Robert E. Hogaboom G-4 LtCol Joseph C. Anderson (USA)
2d Marine Division2Commanding General MajGen Thomas E. Watson Asst. Div. Commander BrigGen Merritt A. Edson Chief of Staff Col David M. Shoup D-1 LtCol James T. Wilbur D-2 LtCol Thomas J. Colley D-3 LtCol Wallace M. Greene, Jr. D-4 Col Robert J. Straub
2d MarinesCommanding Officer Col Walter J. Stuart Executive Officer LtCol John H. Griebel R-1 Capt Leonard G. Hicks R-2 Capt John L. Schwabe R-3 Maj Samuel D. Mandeville, Jr. R-4 Maj Harold K. Throneson
1st Battalion, 2d MarinesBattalion Commander LtCol Wood B. Kyle Executive Officer Maj Wendell W. Andrews Bn-3 Maj Charles P. Lewis, Jr.
2d Battalion, 2d MarinesBattalion Commander LtCol Richard C. Nutting Executive Officer Maj Michael P. Ryan Bn-3 1stLt William B. Somerville
3d Battalion, 2d MarinesBattalion Commander LtCol Walter F. Layer Executive Officer Maj Frederick R. Smith Bn-3 Capt Richard Phillippi
6th MarinesCommanding Officer Col James P. Riseley Executive Officer LtCol Russell Lloyd R-1 Capt Philip J. Costello R-2 Capt Donald V. Nahrgang R-3 Maj Loren E. Haffner R-4 Maj Cyril C. Sheehan
1st Battalion, 6th MarinesBattalion Commander LtCol William K. Jones Executive Officer Maj James A. Donovan, Jr. Bn-3 Capt Paul S. Hospodar
2d Battalion, 6th MarinesBattalion Commander LtCol Edmund B. Games Executive Officer Maj LeRoy P. Hunt, Jr. Bn-3 Maj Hulon H. Riche
3d Battalion, 6th MarinesBattalion Commander LtCol John W. Easley (KIA 2 August)
Maj John E. Rentsch (from 2 August)Executive Officer Maj John E. Rentsch Bn-3 Capt Royal E. North
8th MarinesCommanding Officer Col Clarence R. Wallace Executive Officer LtCol Jack P. Juhan R-1 Capt Lloyd E. Iverson R-2 1stLt James H. Kavanagh, Jr. R-3 Maj William H. Souder, Jr. R-4 Maj Alfred E. Holland
1st Battalion, 8th MarinesBattalion Commander LtCol Lawrence C. Hays, Jr. Executive Officer Maj Robert J. Oddy Bn-3 Maj Daniel V. McWethy, Jr.
2d Battalion, 8th MarinesBattalion Commander LtCol Lane C. Kendall Executive Officer Maj William C. Chamberlin Bn-3 Maj Harry H. Phillips
3d Battalion, 8th MarinesBattalion Commander LtCol Gavin C. Humphrey Executive Officer Maj Stanley E. Larsen Bn-3 Capt William H. Pickett
10th MarinesCommanding Officer Col Raphael Griffin Executive Officer Col Presley M. Rixey R-1 1stLt Russell C. White R-2 1stLt Norman W. Milner R-3 Maj Wade H. Hitt R-4 Capt Cecil H. Yount
1st Battalion, 10th MarinesBattalion Commander LtCol Donovan D. Sult Executive Officer Maj Wendell H. Best Bn-3 Capt Stephen J. Burich
2d Battalion, 10th MarinesBattalion Commander Maj David L. Henderson Executive Officer Maj Kenneth C. Houston Bn-3 Capt Richard B. Cavanaugh
3d Battalion, 10th MarinesBattalion Commander LtCol William C. Capehart Executive Officer Maj James O. Appleyard Bn-3 Capt Alan H. Tully
4th Battalion, 10th MarinesBattalion Commander LtCol Kenneth A. Jorgensen Executive Officer Capt William P. Oliver, Jr. Bn-3 1stLt Edwin D. Smith
18th Marines3Commanding Officer Col Cyril W. Martyr Executive Officer LtCol Ewart S. Laue R-1 Capt Winfield S. Haltom, Jr. R-2 and R-3 Capt Murdoch J. McLeod R-4 Capt Walter J. Hulsey
1st Battalion, 18 MarinesBattalion Commander LtCol August L. Vogt Executive Officer and Bn-3 Capt Joseph G. Polifka
2d Battalion, 18th MarinesBattalion Commander LtCol Chester J. Salazar Executive Officer and Bn-3 Capt Jerome R. Walters
2d Tank BattalionBattalion Commander Maj Charles W. McCoy Executive Officer and Bn-3 Capt John C. Richards, Jr.
2d Amphibian Tractor BattalionBattalion Commander Maj Fenlon A. Durand Executive Officer (not shown) Bn-3 Capt William H. Housman, Jr.
5th Amphibian Tractor BattalionBattalion Commander Capt George L. Shead Executive Officer Capt William C. Stoll, Jr. Bn-3 (not shown)
2d Motor Transport BattalionBattalion Commander Maj Milton J. Green Executive Officer Maj Robert H. Sanders Bn-3 (not shown)
2d Service BattalionBattalion Commander Maj Edward V. Dozier Executive Officer Capt Robert V. Perkins Bn-3 (not shown)
2d Medical BattalionBattalion Commander LCdr Claude R. Bruner (USN) Executive Officer (not shown) Bn-3 (not shown)
4th Marine DivisionDivision Commander MajGen Clifton B. Cates Asst. Div. Commander BrigGen Samuel C. Cumming Chief of Staff Col William W. Rogers D-1 Col Walter I. Jordan D-2 LtCol Gooderham L. McCormick D-3 Col Walter W. Wensinger D-4 Col William F. Brown Support Group Commander4 Col Orin H. Wheeler
14th MarinesCommanding Officer Col Louis G. DeHaven Executive Officer LtCol Randall M. Victory R-1 Capt Cecil D. Snyder R-2 Capt Harrison L. Rogers R-3 Maj Frederick J. Karch R-4 Maj Richard J. Winsborough
1st Battalion, 14th MarinesBattalion Commander LtCol Harry J. Zimmer (KIA 25 July)
Maj Clifford B. Drake (from 25 July)Executive Officer Maj Clifford B. Drake Bn-3 Maj Thomas McE. Fry
2d Battalion 14th MarinesBattalion Commander LtCol George B. Wilson, Jr. Executive Officer Maj William McReynolds Bn-3 Capt Jack H. Riddle
3d Battalion, 14th MarinesBattalion Commander LtCol Robert E. MacFarlane Executive Officer Maj Harvey A. Feehan Bn-3 Capt Benton H. Elliott
4th Battalion, 14th MarinesBattalion Commander LtCol Carl A. Youngdale Executive Officer Maj John B. Edgar, Jr. Bn-3 1stLt Russell F. Schoenbeck
4th, 105mm Howitzer Battalion, V Amphibious CorpsBattalion Commander LtCol Douglas E. Reeve Executive Officer Maj Marvin R. Burdett Bn-3 Capt Joe H. Daniel
20th MarinesCommanding Officer LtCol Nelson K. Brown
Executive Officer Maj Richard G. Ruby (additional duty) R-1 Capt Martin M. Calcaterra R-2 Capt Carl A. Sachs R-3 Maj Melvin D. Henderson R-4 Capt Samuel G. Thompson
1st Battalion, 20th MarinesBattalion Commander Maj Richard G. Ruby Executive Officer Maj George F. Williamson Bn-3 Capt Martin H. Glover
2d Battalion, 20th MarinesBattalion Commander Maj John H. Partridge Executive Officer Capt Howard M. Dowling Bn-3 Capt George A. Smith
23d MarinesCommanding Officer Col Louis R. Jones Executive Officer LtCol John R. Lanigan R-1 Capt Charlie J. Talbert R-2 Capt Richard W. Mirick R-3 Capt William E. Buron R-4 Capt Henry S. Campbell
1st Battalion 23d MarinesBattalion Commander LtCol Ralph Haas Executive Officer Maj James S. Scales Bn-3 Capt William L. Dick
2d Battalion, 23d MarinesBattalion Commander LtCol Edward J. Dillon Executive Officer Maj Robert H. Davidson Bn-3 Capt James W. Sperry
3d Battalion, 23d MarinesBattalion Commander Maj Paul S. Treitel Executive Officer Capt Philip J. Maloney Bn-3 Capt Donald S. Callaham
24th MarinesCommanding Officer Col Franklin A. Hart Executive Officer LtCol Austin R. Brunelli R-1 Capt Kenneth N. Hilton R-2 Capt Arthur B. Hanson R-3 LtCol Charles D. Roberts R-4 Maj Clyde T. Smith
1st Battalion 24 MarinesBattalion Commander LtCol Otto Lessing Executive Officer Maj Robert N. Fricke Bn-3 Capt Gene G. Mundy
2d Battalion, 24th MarinesBattalion Commander Maj Frank E. Garretson (until 27 July)5
LtCol Richard Rothwell (from 27 July)Executive Officer Maj George D. Webster Bn-3 Capt Charles C. Berkeley, Jr.
3d Battalion, 24th MarinesBattalion Commander LtCol Alexander A. Vandegrift, Jr. Executive Officer Capt Doyle A. Stout Bn-3 Capt Webb D. Sawyer
25th MarinesCommanding Officer Col Merton J. Batchelder Executive Officer LtCol Clarence J. O'Donnell R-1 Capt George K. Dunn R-2 Capt Charles D. Gray R-3 LtCol William F. Thyson, Jr. R-4 Maj Arthur E. Buck, Jr.
1st Battalion, 25th MarinesBattalion Commander LtCol Hollis U. Mustain Executive Officer Maj Henry D. Strunk Bn-3 Capt Fenton J. Mee
2d Battalion, 25th MarinesBattalion Commander LtCol Lewis C. Hudson, Jr. Executive Officer Maj William P. Kaempfer Bn-3 Capt Victor J. Barringer
3d Battalion, 25th MarinesBattalion Commander LtCol Justice M. Chambers Executive Officer Maj James Taul Bn-3 (not shown)
4th Tank BattalionBattalion Commander Maj Richard K. Schmidt Executive Officer and Bn-3 Maj Francis L. Orgain
10th Amphibian Tractor BattalionBattalion Commander Maj Victor J. Croizat Executive Officer Maj Harry T. Marshall, Jr. Bn-3 (not shown)
4th Motor Transport BattalionBattalion Commander LtCol Ralph L. Schiesswohl Executive Officer Maj Vaughan H. Huse Bn-3 1stLt Walter W. Alford
4th Service BattalionBattalion Commander Col Richard H. Schubert6 Executive Officer (not shown) Bn-3 2dLt James T. Willis
4th Medical BattalionBattalion Commander Cdr Stewart W. Shimonek (USN) Executive Officer LtCdr George W. Mast (USN) Bn-3 (not shown)
XXIV Corps ArtilleryCommanding General BrigGen Arthur M. Harper (USA) Adjutant Capt Wayne B. Young (USA) S-2 Maj Milford W. Wood (USA) S-3 LtCol F. W. Wheless (USA) S-4 Maj E. P. Waggoner, Jr. (USA)
27th Division Artillery7Commanding General BrigGen Redmond F. Kernan, Jr. (USA) Executive Officer Col Harold G. Browne (USA)
104th Field Artillery BattalionCommanding officer LtCol George P. VanNostrand (USA)
105th Field Artillery BattalionCommanding officer LtCol Nicholas D. LaMorte (USA)
106th Field Artillery BattalionCommanding officer LtCol John J. Fitzgerald (USA)
249th Field Artillery BattalionCommanding officer LtCol Dwight McCallum (USA)
Footnotes
1. Changes in commanders only are shown. Officers listed in other staff positions are those who originally landed with the unit at Tinian. Casualties other than commanders are not shown.
2. The 2d Marine Division's Task Organization for Tinian listed the following units under the Support Group: H&S Co 18th Mar; Hq Co 1st Bn 18th Mar; 4th Plat Co B 1st Bn 18th Mar; 2d Bn 18th Mar (4th Plat Co A and 4th Plat Co C 1st Bn 18th Mar); Hq Co Div Hq Bn; Sig Co Div Hq Bn; MP Co Div Hq Bn; Rcn Co Div Hq Bn; Hq Co 2d Serv Bn; Ord Co 2d Serv Bn; Serv & Sup Co 2d Serv Bn (less dets); H&S Co 2d MT Bn; Co B 2d MT Bn; Co C 2d MT Bn; H&S Co 2d Med Bn (less dets); Co D. 2d Med Bn (less Coll Sec); Co E 2d Med Bn (less Coll Sec); 2d JASCO (less SFC Sec and Air Ln Sec). No commander for the 2d Division's Support Group was specified for the Tinian operation.
3. Command and staff list of 18th Marines is from the unit's muster roles. However, since Colonel Cyril W. Martyr was on temporary duty with Headquarters, VAC functioning as NTLF Shore Party commander, Lieutenant Colonel Ewart S. Laue (executive officer, 18th Marines) acted as regimental commander while Lieutenant Colonel August L. Vogt, commanding 1st Battalion, 18th Marines, performed the additional duties of regimental executive officer.
4. The 4th Marine Division's Task Organization for Tinian listed the following units under the Support Group: Hq Bn (less dets); 4th MT Bn (less dets); 4th Tk Bn (less Cos A, B and C, and dets Co D); 4th Med Bn (less dets); 4th Serv Bn; VMO-4; 1st JASCO (less dets); 2d Tk Bn; and the Prov LVT Gp, V Phib Corps (less dets), which included the 5th, 715th and 534th AmphTrac Bns (all less dets).
5. This command shift resulted when Lieutenant Colonel Rothwell, 2/24's regularly assigned commander, returned after having been sick in the hospital.
6. Actually, the 4th Service Battalion Commander remained with the rear echelon at Maui, T. H., during the Marianas campaign.
7. Complete staff and command list for 27th Division Artillery units not available.