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.

Field Armies Field Armies Shoulder Sleeve Insignia Name Activated Commanding General Campaigns First Army August 10, 1918 Gen. John J. PershingLt. 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. DickmanLt. Gen. Hunter Liggett None

Corps Corps Shoulder Sleeve Insignia Name Activated Commanding General Campaigns I Corps January 20, 1918 Maj. Gen. Hunter LiggettMaj. Gen. Joseph T. DickmanMaj. 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. WrightMaj. Gen. Robert Lee BullardMaj. Gen. John L. Hines - IV Corps June 20, 1918 Col. Stuart Heintzelman (acting)Maj. Gen. Joseph T. DickmanMaj. Gen. Charles H. MuirMaj. Gen. Charles P. Summerall - V Corps July 12, 1918 Maj. Gen. William M. WrightMaj. Gen. George H. CameronMaj. Gen. Charles P. Summerall - VI Corps August 1, 1918 Maj. Gen. Omar BundyBrig. Gen. Briant H. Wells (acting)Maj. Gen. Charles C. BallouMaj. Gen. Charles T. MenoherMaj. Gen. Adelbert Cronkhite - VII Corps August 19, 1918 Maj. Gen. William M. WrightLt. Col. Gordon Johnston (acting)Maj. Gen. Omar BundyCol. Herbert J. Brees (acting)Maj. Gen. William G. HaanMaj. Gen. Henry T. Allen - VIII Corps November 26, 1918 Maj. Gen. Henry T. AllenMaj. Gen. Walter H. Gordon None IX Corps November 26, 1918 Maj. Gen. Adelbert CronkhiteMaj. Gen. Charles P. SummerallMaj. 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. ReadBrig. 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. SibertMaj. Gen. Robert L. BullardMaj. Gen. Charles P. SummerallBrig. Gen. Frank Parker CantignyAisne-MarneSaint-MihielMeuse–Argonne 2nd Division("Indian Head Division") 26 October 1917 1 June 1918 Brig. Gen. Charles A. DoyenMaj. Gen. Omar BundyMaj. Gen. James HarbordMaj. Gen. John A. Lejeune Third AisneBelleau WoodAisne-MarneSaint-MihielMeuse–Argonne 3rd Division ("Rock of the Marne") 21 November 1917 4 June 1918 Maj. Gen. Joseph T. DickmanMaj. Gen. Beaumont B. BuckBrig. Gen. Preston BrownMaj. Gen. Robert Lee Howze Champagne-MarneAisne-MarneSaint-MihielMeuse–Argonne 4th Division ("Ivy Division") 10 December 1917 1 July 1918 Maj. Gen. George H. CameronMaj. Gen. John L. HinesMaj. Gen. Mark L. Hersey Aisne-MarneSaint-MihielMeuse–Argonne 5th Division ("Red Diamond") 11 December 1917 14 June 1918 Maj. Gen. Charles H. MuirMaj. Gen. John E. McMahonMaj. Gen. Hanson E. Ely Saint-MihielMeuse–Argonne 6th Division ("Sight-Seeing Sixth") 26 November 1917 31 August 1918 Brig. Gen. James B. ErwinMaj. Gen. Walter H. Gordon Meuse–Argonne 7th Division ("Hourglass Division") 6 December 1917 10 October 1918 Brig. Gen. Charles H. BarthMaj. Gen. Edmund Wittenmyer Meuse–Argonne 8th Division ("Golden Arrow Division"; "Pathfinder Division") 17 December 1917 15 August 1918 Brig. Gen. Joseph D. LeitchMaj. Gen. John F. MorrisonMaj. Gen. William S. GravesMaj. 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 VanderbiltBrig. Gen. Frank B. WatsonMaj. Gen. Joseph D. Leitch - 14th Division ("Wolverine Division") 9 July 1918 No Combat Brig. Gen. Howard L. LaubachMaj. 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. ShanksMaj. 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. EstesBrig. Gen. Frederick B. Shaw - Insignia Never Selected 19th Division 31 July 1918 No Combat Brig. Gen. Benjamin T. SimmonsMaj. Gen. Charles C. Ballou - 20th Division 31 July 1918 No Combat Brig. Gen. E. Leroy SweetserMaj. 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. EdwardsBrig. Gen. Frank E. Bamford Champagne-MarneAisne-MarneSaint-MihielMeuse–Argonne 27th Division ("New York Division" and "Orion Division")(New York) 15 July 1917 25 July 1918 Maj. Gen. John F. O'Ryan Somme OffensiveYpres-LysMeuse–Argonne (Artillery Only) 28th Division ("Keystone Division")(Pennsylvania) 5 August 1917 14 July 1918 Maj. Gen. Charles H. MuirMaj. Gen. William H. Hay Champagne-MarneOise-AisneAisne-MarneSaint-MihielMeuse–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. TownsleyMaj. Gen. George W. ReadMaj. Gen. Edward M. Lewis Somme OffensiveYpres-Lys 31st Division ("Dixie Division")(Alabama, Florida, Georgia) 25 August 1917 No Combat(Depot Division) Maj. Gen. Francis J. KernanBrig. Gen. John L. HaydenMaj. Gen. Francis H. FrenchMaj. Gen. LeRoy S. Lyon - 32nd Division ("Les Terribles"; "Red Arrow Division")(Michigan and Wisconsin) 26 August 1917 15 July 1918 Maj. Gen. James ParkerMaj. Gen. William G. HaanMaj. Gen. William Lassiter Oise-AisneAisne-MarneMeuse–Argonne 33rd Division ("Prairie Division")(Illinois) 25 August 1917 17 July 1918 Maj. Gen. George Bell Jr. Somme OffensiveMeuse–Argonne 34th Division ("Red Bull Division")(Iowa, Nebraska, North Dakota, South Dakota) 18 July 1917 No Combat(Depot Division) Maj. Gen. Augustus P. BlocksomBrig. Gen. John A. JohnstonMaj. Gen. Charles D. Rhodes - 35th Division ("Santa Fe Division")(Kansas and Missouri) 18 July 1917 26 September 1918 Maj. Gen. William M. WrightBrig. Gen. Nathaniel F. McClureMaj. 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 GrebleMaj. Gen. William R. Smith Meuse–Argonne 37th Division ("Buckeye Division")(Ohio) 26 August 1917 4 August 1918 Maj. Gen. Charles TreatBrig. Gen. Joseph A. GastonMaj. Gen. Charles S. Farnsworth Meuse–ArgonneYpres-Lys 38th Division ("Cyclone Division")(Indiana, Kentucky, West Virginia) 25 August 1917 No Combat(Depot Division) Maj. Gen. William H. SageBrig. Gen. William V. JudsonAugustine McIntyre Jr.Brig. Gen. Frank M. CaldwellMaj. 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. StrongBrig. Gen. LeRoy S. LyonBrig. Gen. George H. Cameron - 41st Division ("Sunset Division")(Idaho, Montana, Oregon, Washington, Wyoming) 18 July 1917 No Combat(Depot Division) Maj. Gen. Hunter LiggettBrig. Gen. Henry JerveyBrig. Gen. George L. IrwinBrig. Gen. Richard Coulter Jr.Brig. Gen. Robert AlexanderBrig. Gen. Edward VollrathMaj. Gen. John E. McMahonBrig. Gen. Eli K. Cole, USMCMaj. Gen. Peter E. Traub Meuse–Argonne (Artillery Only) 42nd Division ("Rainbow Division") 1 August 1917 16 June 1918 Maj. Gen. William A. MannMaj. Gen. Charles T. MenoherMaj. Gen. Charles D. RhodesBrig. Gen. Douglas MacArthur Champagne-MarneSaint-MihielMeuse–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. HodgesBrig. Gen. William WeigelBrig. Gen. Frank H. Albright - 77th Division ("Statue of Liberty Division") 5 August 1917 21 June 1918 Maj. Gen. J. Franklin BellMaj. Gen. George B. DuncanBrig. Gen. Evan M. JohnsonMaj. Gen. Robert Alexander Oise-AisneMeuse–Argonne 78th Division ("Lightning Division") 5 August 1917 12 September 1918 Maj. Gen. Chase W. KennedyBrig. Gen. John S. MalloryBrig. Gen. James T. DeanMaj. Gen. Hugh L. ScottMaj. Gen. James McRae Saint-MihielMeuse–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 HallMaj. Gen. Adelbert CronkhiteBrig. Gen. Lloyd M. BrettBrig. Gen. Wilds P. RichardsonBrig. Gen. Charles S. FarnsworthMaj. Gen. Samuel D. Sturgis Jr. Somme OffensiveMeuse–Argonne 81st Division ("Wildcat Division") 5 August 1917 2 November 1918 Maj. Gen. Charles H. BarthMaj. Gen. Charles J. BaileyBrig. Gen. George W. McIver Meuse–Argonne 82nd Division ("All-American Division") 5 August 1917 18 July 1918 Maj. Gen. Eben SwiftMaj. Gen. William P. BurnhamMaj. Gen. George B. Duncan Saint-MihielMeuse–Argonne 83rd Division ("Ohio Division") 5 August 1917 None(Depot Division) Maj. Gen. Edwin F. GlennBrig. Gen. Willard A. Holbrook Vittorio Veneto(332nd Infantry only) 84th Division ("Railsplitters") 5 August 1917 None(Depot Division) Maj. Gen. Harry C. HaleBrig. Gen. Wilber E. Wilder - 85th Division ("Custer Division") 5 August 1917 None(Depot Division) Maj. Gen. Joseph T. DickmanMaj. Gen. James ParkerMaj. Gen. Chase W. Kennedy - 86th Division ("Blackhawk Division") 5 August 1917 None(Depot Division) Maj. Gen. Thomas H. BarryBrig. Gen. Lyman W. V. KennonMaj. Gen. Charles MartinBrig. Gen. Lincoln C. AndrewsMaj. Gen. Charles C. Ballou - 87th Division ("Golden Acorn Division") 5 August 1917 None(Depot Division) Maj. Gen. Samuel D. SturgisBrig. Gen. William F. Martin - 88th Division ("Fighting Blue Devils"; "Clover Leaf Division") 5 August 1917 7 October 1918 Maj. Gen. Edward H. PlummerBrig. Gen. Robert N. GettyBrig. Gen. William D. BeachMaj. Gen. William Weigel Meuse–Argonne 89th Division ("Rolling W") 5 August 1917 12 September 1918 Maj. Gen. Leonard WoodMaj. Gen. William M. WrightMaj. Gen. Frank L. Winn Saint-MihielMeuse–Argonne 90th Division ("Tough 'Ombres") 5 August 1917 12 September 1918 Maj. Gen. Henry T. AllenMaj. Gen. Charles Martin Saint-MihielMeuse–Argonne 91st Division ("Pine Tree Division"; "Wild West Division") 5 August 1917 26 September 1918 Maj. Gen. Henry A. GreeneMaj. Gen. William Johnston Jr. Meuse–Argonne 92nd Division (Colored) ("Buffalo Soldiers") 24 October 1917 26 September 1918 Maj. Gen. Charles C. BallouMaj. Gen. Charles MartinBrig. 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 AisneSecond Marne

National Army (94th-102nd)