List of formations of the United States Army during World War I

This is a list of formations in the United States Army during World War I. Many of these formations still exist today, though many by different designations.

Seal of the United States War Department

Field Armies

Field Armies
Shoulder Sleeve Insignia	Name	Activated	Commanding General	Campaigns
	First Army	August 10, 1918	Gen. John J. Pershing Lt. Gen. Hunter Liggett	Meuse-Argonne
	Second Army	October 10, 1918	Lt. Gen. Robert L. Bullard	Meuse-Argonne
	Third Army	November 15, 1918	Maj. Gen. Joseph T. Dickman Lt. Gen. Hunter Liggett	None

Corps

Corps
Shoulder Sleeve Insignia	Name	Activated	Commanding General	Campaigns
	I Corps	January 20, 1918	Maj. Gen. Hunter Liggett Maj. Gen. Joseph T. Dickman Maj. Gen. William M. Wright	-
	II Corps	February 24, 1918	Col. George S. Simonds (acting) Maj. Gen. George W. Read	-
	III Corps	May 16, 1918	Col. Alfred W. Bjornstad (acting) Maj. Gen. William M. Wright Maj. Gen. Robert Lee Bullard Maj. Gen. John L. Hines	-
	IV Corps	June 20, 1918	Col. Stuart Heintzelman (acting) Maj. Gen. Joseph T. Dickman Maj. Gen. Charles H. Muir Maj. Gen. Charles P. Summerall	-
	V Corps	July 12, 1918	Maj. Gen. William M. Wright Maj. Gen. George H. Cameron Maj. Gen. Charles P. Summerall	-
	VI Corps	August 1, 1918	Maj. Gen. Omar Bundy Brig. Gen. Briant H. Wells (acting) Maj. Gen. Charles C. Ballou Maj. Gen. Charles T. Menoher Maj. Gen. Adelbert Cronkhite	-
	VII Corps	August 19, 1918	Maj. Gen. William M. Wright Lt. Col. Gordon Johnston (acting) Maj. Gen. Omar Bundy Col. Herbert J. Brees (acting) Maj. Gen. William G. Haan Maj. Gen. Henry T. Allen	-
	VIII Corps	November 26, 1918	Maj. Gen. Henry T. Allen Maj. Gen. Walter H. Gordon	None
	IX Corps	November 26, 1918	Maj. Gen. Adelbert Cronkhite Maj. Gen. Charles P. Summerall Maj. Gen. Henry T. Allen	None

Divisions

Cavalry divisions

Cavalry Divisions
Shoulder Sleeve Insignia	Name	Activated	Entered Combat	Commanding General	Campaigns
None	15th Cavalry Division	November 27, 1917	None	Maj. Gen. George W. Read Brig. Gen. DeRosey C. Cabell	-

Infantry divisions

Regular Army

Infantry Divisions
Shoulder Sleeve Insignia	Name	Activated	Entered Combat	Commanding General	Campaigns
	1st Division ("The Big Red One")	24 May 1917	28 May 1918	Maj. Gen. William L. Sibert Maj. Gen. Robert L. Bullard Maj. Gen. Charles P. Summerall Brig. Gen. Frank Parker	Cantigny Aisne-Marne Saint-Mihiel Meuse–Argonne
	2nd Division ("Indian Head Division")	26 October 1917	1 June 1918	Brig. Gen. Charles A. Doyen Maj. Gen. Omar Bundy Maj. Gen. James Harbord Maj. Gen. John A. Lejeune	Third Aisne Belleau Wood Aisne-Marne Saint-Mihiel Meuse–Argonne
	3rd Division ("Rock of the Marne")	21 November 1917	4 June 1918	Maj. Gen. Joseph T. Dickman Maj. Gen. Beaumont B. Buck Brig. Gen. Preston Brown Maj. Gen. Robert Lee Howze	Champagne-Marne Aisne-Marne Saint-Mihiel Meuse–Argonne
	4th Division ("Ivy Division")	10 December 1917	1 July 1918	Maj. Gen. George H. Cameron Maj. Gen. John L. Hines Maj. Gen. Mark L. Hersey	Aisne-Marne Saint-Mihiel Meuse–Argonne
	5th Division ("Red Diamond")	11 December 1917	14 June 1918	Maj. Gen. Charles H. Muir Maj. Gen. John E. McMahon Maj. Gen. Hanson E. Ely	Saint-Mihiel Meuse–Argonne
	6th Division ("Sight-Seeing Sixth")	26 November 1917	31 August 1918	Brig. Gen. James B. Erwin Maj. Gen. Walter H. Gordon	Meuse–Argonne
	7th Division ("Hourglass Division")	6 December 1917	10 October 1918	Brig. Gen. Charles H. Barth Maj. Gen. Edmund Wittenmyer	Meuse–Argonne
	8th Division ("Golden Arrow Division"; "Pathfinder Division")	17 December 1917	15 August 1918	Brig. Gen. Joseph D. Leitch Maj. Gen. John F. Morrison Maj. Gen. William S. Graves Maj. Gen. Eli A. Helmick	Siberia
	9th Division ("Varsity")	18 July 1918	No Combat	Maj. Gen. Willard Ames Holbrook	-
	10th Division	9 July 1918	No Combat	Maj. Gen. Leonard Wood	-
	11th Division ("Lafayette Division")	15 August 1918	No Combat	Maj. Gen. Jesse McI. Carter	-
	12th Division ("Plymouth Division")	12 July 1918	No Combat	Maj. Gen. Henry P. McCain	-
	13th Division ("Lucky 13th")	16 July 1918	No Combat	Brig. Gen. Cornelius Vanderbilt Brig. Gen. Frank B. Watson Maj. Gen. Joseph D. Leitch	-
	14th Division ("Wolverine Division")	9 July 1918	No Combat	Brig. Gen. Howard L. Laubach Maj. Gen. Grote Hutcheson	-
Insignia Never Selected	15th Division	31 July 1918	No Combat	Brig. Gen. Guy V. Henry Jr.	-
	16th Division	31 July 1918	No Combat	Maj. Gen. David C. Shanks Maj. Gen. Guy Carleton	-
	17th Division	31 July 1918	No Combat	Maj. Gen. Henry C. Hodges Jr.	-
	18th Division ("Cactus Division")	31 July 1918	No Combat	Brig. Gen. George H. Estes Brig. Gen. Frederick B. Shaw	-
Insignia Never Selected	19th Division	31 July 1918	No Combat	Brig. Gen. Benjamin T. Simmons Maj. Gen. Charles C. Ballou	-
	20th Division	31 July 1918	No Combat	Brig. Gen. E. Leroy Sweetser Maj. Gen. Harry F Hodges	-

National Guard

Infantry Divisions
Shoulder Sleeve Insignia	Name (National Guard units from)	Activated	Entered Combat	Commanding General	Campaigns
	26th Division ("Yankee Division") (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont)	18 July 1917	10 April 1918	Maj. Gen. Clarence R. Edwards Brig. Gen. Frank E. Bamford	Champagne-Marne Aisne-Marne Saint-Mihiel Meuse–Argonne
	27th Division ("New York Division" and "Orion Division") (New York)	15 July 1917	25 July 1918	Maj. Gen. John F. O'Ryan	Somme Offensive Ypres-Lys Meuse–Argonne (Artillery Only)
	28th Division ("Keystone Division") (Pennsylvania)	5 August 1917	14 July 1918	Maj. Gen. Charles H. Muir Maj. Gen. William H. Hay	Champagne-Marne Oise-Aisne Aisne-Marne Saint-Mihiel Meuse–Argonne
	29th Division ("Blue and Grey Division") (Delaware, Maryland, New Jersey, Virginia, Washington D.C.)	18 July 1917	29 September 1918	Maj. Gen. Charles G. Morton	Meuse–Argonne
	30th Division ("Old Hickory Division") (Georgia, North Carolina, South Carolina, Tennessee)	28 August 1917	5 July 1918	Maj. Gen. John F. Morrison Maj. Gen. Clarence P. Townsley Maj. Gen. George W. Read Maj. Gen. Edward M. Lewis	Somme Offensive Ypres-Lys
	31st Division ("Dixie Division") (Alabama, Florida, Georgia)	25 August 1917	No Combat (Depot Division)	Maj. Gen. Francis J. Kernan Brig. Gen. John L. Hayden Maj. Gen. Francis H. French Maj. Gen. LeRoy S. Lyon	-
	32nd Division ("Les Terribles"; "Red Arrow Division") (Michigan and Wisconsin)	26 August 1917	15 July 1918	Maj. Gen. James Parker Maj. Gen. William G. Haan Maj. Gen. William Lassiter	Oise-Aisne Aisne-Marne Meuse–Argonne
	33rd Division ("Prairie Division") (Illinois)	25 August 1917	17 July 1918	Maj. Gen. George Bell Jr.	Somme Offensive Meuse–Argonne
	34th Division ("Red Bull Division") (Iowa, Nebraska, North Dakota, South Dakota)	18 July 1917	No Combat (Depot Division)	Maj. Gen. Augustus P. Blocksom Brig. Gen. John A. Johnston Maj. Gen. Charles D. Rhodes	-
	35th Division ("Santa Fe Division") (Kansas and Missouri)	18 July 1917	26 September 1918	Maj. Gen. William M. Wright Brig. Gen. Nathaniel F. McClure Maj. Gen. Peter E. Traub	Meuse–Argonne
	36th Division ("Texas Division" or "Arrowhead Division") (Texas and Oklahoma)	18 July 1917	10 October 1918	Maj. Gen. Edwin St. John Greble Maj. Gen. William R. Smith	Meuse–Argonne
	37th Division ("Buckeye Division") (Ohio)	26 August 1917	4 August 1918	Maj. Gen. Charles Treat Brig. Gen. Joseph A. Gaston Maj. Gen. Charles S. Farnsworth	Meuse–Argonne Ypres-Lys
	38th Division ("Cyclone Division") (Indiana, Kentucky, West Virginia)	25 August 1917	No Combat (Depot Division)	Maj. Gen. William H. Sage Brig. Gen. William V. Judson Augustine McIntyre Jr. Brig. Gen. Frank M. Caldwell Maj. Gen. Robert Lee Howze	-
	39th Division ("Delta Division") (Arkansas, Louisiana, Mississippi)	18 July 1917	No Combat (Depot Division)	Maj. Gen. Henry C. Hodges Jr. Brig. Gen. Ira A. Haynes	-
	40th Division ("Sunshine Division") (Arizona, California, Colorado, Nevada, New Mexico, Utah)	18 July 1917	No Combat (Depot Division)	Maj. Gen. Frederick S. Strong Brig. Gen. LeRoy S. Lyon Brig. Gen. George H. Cameron	-
	41st Division ("Sunset Division") (Idaho, Montana, Oregon, Washington, Wyoming)	18 July 1917	No Combat (Depot Division)	Maj. Gen. Hunter Liggett Brig. Gen. Henry Jervey Brig. Gen. George L. Irwin Brig. Gen. Richard Coulter Jr. Brig. Gen. Robert Alexander Brig. Gen. Edward Vollrath Maj. Gen. John E. McMahon Brig. Gen. Eli K. Cole, USMC Maj. Gen. Peter E. Traub	Meuse–Argonne (Artillery Only)
	42nd Division ("Rainbow Division")	1 August 1917	16 June 1918	Maj. Gen. William A. Mann Maj. Gen. Charles T. Menoher Maj. Gen. Charles D. Rhodes Brig. Gen. Douglas MacArthur	Champagne-Marne Saint-Mihiel Meuse–Argonne

National Army (76th-93rd)

Infantry Divisions
Shoulder Sleeve Insignia	Name	Activated	Entered Combat	Commanding General	Campaigns
	76th Division ("Liberty Bell Division"; "Onaway Division")	25 August 1917	No Combat (Depot Division)	Maj. Gen. Harry F. Hodges Brig. Gen. William Weigel Brig. Gen. Frank H. Albright	-
	77th Division ("Statue of Liberty Division")	5 August 1917	21 June 1918	Maj. Gen. J. Franklin Bell Maj. Gen. George B. Duncan Brig. Gen. Evan M. Johnson Maj. Gen. Robert Alexander	Oise-Aisne Meuse–Argonne
	78th Division ("Lightning Division")	5 August 1917	12 September 1918	Maj. Gen. Chase W. Kennedy Brig. Gen. John S. Mallory Brig. Gen. James T. Dean Maj. Gen. Hugh L. Scott Maj. Gen. James McRae	Saint-Mihiel Meuse–Argonne
	79th Division ("Cross of Lorraine Division")	5 August 1917	15 September 1918	Maj. Gen. Joseph E. Kuhn	Meuse–Argonne
	80th Division ("Blue Ridge Division")	5 August 1917	23 July 1917	Brig. Gen. Herman Hall Maj. Gen. Adelbert Cronkhite Brig. Gen. Lloyd M. Brett Brig. Gen. Wilds P. Richardson Brig. Gen. Charles S. Farnsworth Maj. Gen. Samuel D. Sturgis Jr.	Somme Offensive Meuse–Argonne
	81st Division ("Wildcat Division")	5 August 1917	2 November 1918	Maj. Gen. Charles H. Barth Maj. Gen. Charles J. Bailey Brig. Gen. George W. McIver	Meuse–Argonne
	82nd Division ("All-American Division")	5 August 1917	18 July 1918	Maj. Gen. Eben Swift Maj. Gen. William P. Burnham Maj. Gen. George B. Duncan	Saint-Mihiel Meuse–Argonne
	83rd Division ("Ohio Division")	5 August 1917	None (Depot Division)	Maj. Gen. Edwin F. Glenn Brig. Gen. Willard A. Holbrook	Vittorio Veneto (332nd Infantry only)
	84th Division ("Railsplitters")	5 August 1917	None (Depot Division)	Maj. Gen. Harry C. Hale Brig. Gen. Wilber E. Wilder	-
	85th Division ("Custer Division")	5 August 1917	None (Depot Division)	Maj. Gen. Joseph T. Dickman Maj. Gen. James Parker Maj. Gen. Chase W. Kennedy	-
	86th Division ("Blackhawk Division")	5 August 1917	None (Depot Division)	Maj. Gen. Thomas H. Barry Brig. Gen. Lyman W. V. Kennon Maj. Gen. Charles Martin Brig. Gen. Lincoln C. Andrews Maj. Gen. Charles C. Ballou	-
	87th Division ("Golden Acorn Division")	5 August 1917	None (Depot Division)	Maj. Gen. Samuel D. Sturgis Brig. Gen. William F. Martin	-
	88th Division ("Fighting Blue Devils"; "Clover Leaf Division")	5 August 1917	7 October 1918	Maj. Gen. Edward H. Plummer Brig. Gen. Robert N. Getty Brig. Gen. William D. Beach Maj. Gen. William Weigel	Meuse–Argonne
	89th Division ("Rolling W")	5 August 1917	12 September 1918	Maj. Gen. Leonard Wood Maj. Gen. William M. Wright Maj. Gen. Frank L. Winn	Saint-Mihiel Meuse–Argonne
	90th Division ("Tough 'Ombres")	5 August 1917	12 September 1918	Maj. Gen. Henry T. Allen Maj. Gen. Charles Martin	Saint-Mihiel Meuse–Argonne
	91st Division ("Pine Tree Division"; "Wild West Division")	5 August 1917	26 September 1918	Maj. Gen. Henry A. Greene Maj. Gen. William Johnston Jr.	Meuse–Argonne
	92nd Division (Colored) ("Buffalo Soldiers")	24 October 1917	26 September 1918	Maj. Gen. Charles C. Ballou Maj. Gen. Charles Martin Brig. Gen. James B. Erwin	Meuse–Argonne
	93rd Division (Colored) ("Blue Helmets") (only infantry organized)	23 November 1917	8 April 1918	Brig. Gen. Roy Hoffman	Third Aisne Second Marne

National Army (94th-102nd)

Infantry Divisions
Shoulder Sleeve Insignia	Name	Activated	Commanding General	Area of Origin
	94th Division (Only Infantry Organized)	6 June 1918	None	Puerto Rico
	95th Division (Not Fully Organized)	5 September 1918	Col. Julien E. V. Gaujot Col. Edward Croft Brig. Gen. Mathew C. Smith	-
	96th Division (Not Fully Organized)	5 September 1918	Maj. Gen. Guy Carleton	-
	97th Division (Not Fully Organized)	5 September 1918	Col. Carl A. Martin Brig. Gen. James R. Lindsay	Minnesota Oklahoma
	98th Division (Only HQ Organized)	23 July 1918	Col. Jennings B. Wilson (Chief of Staff)	-
	99th Division (Only HQ Organized)	23 July 1918	Lt. Col. Paul W. Beck (Chief of Staff)	-
	100th Division (Only HQ Organized)	23 July 1918	Col. William L. Reed (Chief of Staff)	-
	101st Division (Only HQ Organized)	23 July 1918	Col. Patrick H. Mullay (Chief of Staff)	-
	102nd Division (Only Cadre Organized)	23 July 1918	None	-

Brigades

Cavalry brigades

Infantry brigades

Regular Army

Infantry Brigades
Shoulder Sleeve Insignia	Name	Parent Organization	Activated	Organic Units	Commanding General
	1st Infantry Brigade	1st Division	May 24, 1917	16th Infantry Regiment 18th Infantry Regiment 2nd Machine Gun Battalion	Brig. Gen. Omar Bundy Brig Gen. George B. Duncan Brig. Gen. John L. Hines Brig. Gen. Frank Parker Col. Hjalmar Erickson
	2nd Infantry Brigade	1st Division	May 24, 1917	26th Infantry Regiment 28th Infantry Regiment 3rd Machine Gun Battalion	Brig. Gen. Robert Lee Bullard Brig. Gen. Beaumont B. Buck Brig. Gen. Frank E. Bamford Brig. Gen. George C. Barnhardt Brig. Gen. Francis Marshall
	3rd Infantry Brigade	2nd Division	October 6, 1917	9th Infantry Regiment 23rd Infantry Regiment 5th Machine Gun Battalion	Col. Walter K. Wright Brig. Gen. Peter Murray Brig. Gen. Edward M. Lewis Brig. Gen. Hanson E. Ely Col. Robert O. Van Horn Col. James C. Rhea Brig. Gen. Charles E. Kilbourne Brig. Gen. Thomas W. Darrah Brig. Gen. Paul B. Malone
	4th Marine Brigade	2nd Division	October 23, 1917	5th Marine Regiment 6th Marine Regiment 6th Machine Gun Battalion	Brig. Gen. Charles A. Doyen Brig. Gen. James Harbord Brig. Gen. John Lejeune Brig. Gen. Wendell C. Neville

Field artillery brigades

Artillery brigades (Coast Artillery Corps)

Depot brigades

Technical Services

Ambulance corps

Motor transport Corps

The Motor Transport Corps of the United States Army during World War 1

Coast artillery corps

United States Army Coast Artillery Corps - provided almost all US-manned heavy and railway artillery units

Tank corps

United States Tank Corps

Signal corps

References

Rinaldi, Richard A. (2004). The U. S. Army in World War I: Orders of Battle. General Data LLC. ISBN 0-9720296-4-8.