This is a list of historical formations of the United States Army. Units still in existence are in bold.

For specific eras: Formations of the United States Army during the Mexican Revolution Formations of the United States Army during World War I Formations of the United States Army during World War II Formations of the United States Army during the Vietnam War Formations of the United States Army during the War on Terrorism List of current formations of the United States Army

List of formations of the United States Army

Army groups

1st Army Group (World War II "phantom" formation) 6th Army Group 12th Army Group 15th Army Group

List of formations of the United States Army

Field armies

First Allied Airborne Army

First United States Army—U.S. Army Training, Readiness, and Mobilization command formation Second United States Army—United States Army Cyber Command Third United States Army—United States Army Central command formation Fourth United States Army Fifth United States Army—United States Army North command formation Sixth United States Army—United States Army South command formation Seventh United States Army—United States Army Europe command formation Eighth United States Army—United States Army Korea command formation Ninth United States Army—United States Army Africa command formation Tenth United States Army Fourteenth United States Army (World War II "phantom" formation) Fifteenth United States Army

List of formations of the United States Army

Army corps

Airborne, armored, and infantry are grouped separately. The numbering system for the airborne corps is a continuation of the infantry numbering system.

Airborne corps

XVIII Airborne Corps

Armored corps

I Armored Corps (reflagged as the Seventh Army) II Armored Corps (reflagged as XVIII Airborne Corps) III Armored Corps (reflagged as XIX Corps) IV Armored Corps (reflagged as XX Corps)

Army corps

I Corps

II Corps

III Corps

IV Corps

V Corps

VI Corps

VII Corps

VIII Corps

IX Corps

X Corps

XI Corps

XII Corps

XIII Corps

XIV Corps

XV Corps

XVI Corps

XVII Corps

XIX Corps

XX Corps

XXI Corps

XXII Corps

XXIII Corps

XXIV Corps

XXXVI Corps

XXXVII Corps

Army divisions

Air assault divisions

11th Air Assault Division (Test) (1963–1965)

Airborne divisions

6th Airborne Division (phantom World War II division) 9th Airborne Division (phantom World War II division) 11th Airborne Division "Angels" 13th Airborne Division "Lucky Thirteenth" 15th Airborne Division (unorganized World War II division) 17th Airborne Division "Golden Talons" 18th Airborne Division (phantom World War II division) 21st Airborne Division (phantom World War II division) 80th Airborne Division (1946–52) 82nd Airborne Division "All American" 84th Airborne Division (1946–52) 100th Airborne Division (1946–52) 101st Airborne Division "Screaming Eagles" 108th Airborne Division (1946–52), Later Division was Army Reserve Division, serving as in Infantry and later Training missions 135th Airborne Division (phantom World War II division)

Armored divisions

1st Armored Division "Old Ironsides" 2nd Armored Division "Hell On Wheels" 3rd Armored Division "Spearhead Division" 4th Armored Division "Breakthrough Division" 5th Armored Division "Victory" 6th Armored Division "Super Sixth", "Bulgebusters" 7th Armored Division "Lucky Seventh" 8th Armored Division "Showhorse" 9th Armored Division "The Phantom Division" 10th Armored Division "Tiger Division" 11th Armored Division "Thunderbolt Division" 12th Armored Division "Hellcat Division" 13th Armored Division 14th Armored Division 15th Armored Division (phantom World War II division) 16th Armored Division 18th Armored Division (unorganized World War II division) 19th Armored Division (unorganized World War II division) 20th Armored Division 21st Armored Division (unorganized World War II division) 22nd Armored Division (unorganized World War II division) 25th Armored Division (phantom World War II division) 27th Armored Division 30th Armored Division 39th Armored Division (phantom World War II division) (possible post war Armored Brigade, not division) 40th Armored Division 48th Armored Division (Georgia Army National Guard to 1967) 49th Armored Division "Lone Star" TX ARNG (1946–68, 1973–2004) 50th Armored Division "Jersey Blues" NJ ARNG (up to early 1990s)