# List of formations of the United States Army

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

## Army groups

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

## 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

## 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
## 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)

### Cavalry divisions

* Cavalry Division—authorized as the 4th Regular Army division in 1913; never officially numerically designated.
* 1st Cavalry Division
* 2nd Cavalry Division
* 3rd Cavalry Division
* 15th Cavalry Division
* 21st Cavalry Division
* 22nd Cavalry Division
* 23rd Cavalry Division
* 24th Cavalry Division
* 61st Cavalry Division
* 62nd Cavalry Division
* 63rd Cavalry Division
* 64th Cavalry Division
* 65th Cavalry Division
* 66th Cavalry Division

### Infantry divisions

* 1st Infantry Division "The Big Red One"
* 2nd Infantry Division "Indian Head Division"
* 3rd Infantry Division "Rock of the Marne"
* 4th Infantry Division "Ivy Division", "Iron Horse"
* 5th Infantry Division "Red Diamond"
* 6th Infantry Division "Red Star"
* 7th Infantry Division "Bayonet Division"
* 8th Infantry Division "Pathfinders", "Golden Arrow"
* 9th Infantry Division "Octfoil", "Old Reliables"
* 10th Division (World War I)
* 10th Mountain Infantry Division (1943–1957)
* 11th Division (World War I)
* 12th Division (World War I)
* 12th Infantry Division "Philippine division"
* 13th Division "Lucky 13 Division" (World War I)
* 14th Division (World War I)
* 14th Infantry Division (phantom World War II division)
* 15th Division (World War I)
* 16th Division (World War I)
* 17th Division (World War I)
* 18th Division (World War I)
* 19th Division "Moon & Star"
* 19th Infantry Division (phantom World War II division)
* 20th Division (World War I)
* 22nd Infantry Division (phantom World War II division)
* 23rd Infantry Division "Americal Division"
* 24th Infantry Division "Victory Division"
* 25th Infantry Division "Tropic Lightning"
* 26th Infantry Division "Yankee Division"
* 27th Infantry Division "New York Division"
* 28th Infantry Division "Keystone Division"
* 29th Infantry Division "The Blue and Gray"
* 30th Infantry Division "Old Hickory"
* 31st Infantry Division "Dixie Division"
* 32nd Infantry Division "Red Arrow"
* 33rd Infantry Division "Prairie Division"
* 34th Infantry Division "Red Bull Division"
* 35th Infantry Division "Santa Fe Division"
* 36th Infantry Division "Texas Division"
* 37th Infantry Division "Buckeye Division"
* 38th Infantry Division "Cyclone Division"
* 39th Infantry Division "Delta Division"
* 40th Infantry Division "Sunburst Division"
* 41st Infantry Division "Sunset Division"
* 42nd Infantry Division "Rainbow Division"
* 43rd Infantry Division "Red Wing Division"
* 44th Infantry Division
* 45th Infantry Division "Thunderbird Division"
* 46th Infantry Division (United States) (phantom World War II division, postwar National Guard formation)
* 47th Infantry Division (Post-war National Guard Division nicknamed "Viking")
* 48th Infantry Division (United States) (phantom World War II division, postwar National Guard formation)
* 49th Infantry Division (Post-war National Guard Division nicknamed "49'ers")
* 50th Infantry Division (phantom World War II division)
* 51st Infantry Division (Post-war National Guard Division)
* 52nd Infantry Division
* 55th Infantry Division (phantom World War II division)
* 59th Infantry Division (phantom World War II division)
* 61st Infantry Division (see Divisions of the United States Army, unorganized World War II division)
* 62nd Infantry Division (see Divisions of the United States Army, unorganized World War II division)
* 63rd Infantry Division
* 65th Infantry Division
* 66th Infantry Division
* an infantry division with the number 67 was never organized during World War II (see Divisions of the United States Army)
* 68th Infantry Division - never organized during World War II (see Divisions of the United States Army)
* 69th Infantry Division
* 70th Infantry Division "Trailblazers"
* 71st Infantry Division "Red Circle"
* an infantry division with the number 72 was never organized during World War II (see Divisions of the United States Army)
* an infantry division with the number 73 was never organized during World War II (see Divisions of the United States Army)
* an infantry division with the number 74 was never organized during World War II (see Divisions of the United States Army)
* 75th Infantry Division
* 76th Infantry Division "Liberty Bell Division"
* 77th Infantry Division "Metropolitan Division" also "Statue of Liberty Division"
* 78th Infantry Division "Lightning Division"
* 79th Infantry Division "Liberty Division"
* 80th Infantry Division "Blue Ridge Division"
* 81st Infantry Division "Wildcat Division"
* 82nd Infantry Division "All American Division" (Later Airborne Division with same number)
* 83rd Infantry Division "Thunderbolt Division"
* 84th Infantry Division "Railsplitters"
* 85th Infantry Division "Custer Division"
* 86th Infantry Division "Blackhawk Division"
* 87th Infantry Division "Golden Acorn"
* 88th Infantry Division "Blue Devils"
* 89th Infantry Division "Rolling W Division"
* 90th Infantry Division "Tough Ombres"
* 91st Infantry Division "Wild West"
* 92nd Infantry Division "Buffalo Division"
* 93rd Infantry Division "Blue Helmets"
* 94th Infantry Division "Neuf-Cats"
* 95th Infantry Division "Ironman Division" (Also "Victory Division", and "Iron Men of Metz Division")
* 96th Infantry Division "Deadeye Division"
* 97th Infantry Division "Trident Division"
* 98th Infantry Division "Iroquois"
* 99th Infantry Division "Checkerboard Division"
* 100th Infantry Division "Century"
* 101st Division (Later Airborne Division with same number)
* 102nd Infantry Division "Ozark Division"
* 103rd Infantry Division "Cactus Division"
* 104th Infantry Division "Timberwolf"
* intended as a Black formation, an infantry division with the number 105 was never organized during World War II
* 106th Infantry Division "Golden Lion Division"
* an infantry division with the number 107 was never organized during World War II
* 108th Infantry Division {phantom World War II Division}
* 108th Infantry Division "Golden Griffons" (Formerly Airborne Division of same number)
* 109th Infantry Division (phantom World War II division)
* 112th Infantry Division (phantom World War II division)
* 119th Infantry Division (phantom World War II division)
* 125th Infantry Division (phantom World War II division)
* 130th Infantry Division (phantom World War II division)
* 141st Infantry Division (phantom World War II division)
* 157th Infantry Division (phantom World War II division)
* Americal Division (see 23rd Infantry Division)
* Hawaiian Division (see also: 24th Infantry Division; 25th Infantry Division)
* Maneuver Division (1911)
* Panama Canal Division (inactivated 1932)
* Philippine Division (see 12th Infantry Division)

### Light divisions

* 10th Light Division (Alpine)
* 71st Light Division (Truck)
* 89th Light Division (Pack)

### Mountain divisions

* 10th Mountain Division

### Reserve training divisions

* 75th Division
* 78th Division "Lightning Division"
* 80th Division "Blue Ridge Division"
* 84th Division "Lincoln County Division"
* 85th Division "Custer Division"
* 87th Division "Golden Acorn Division"
* 91st Division "Wild West Division"
* 95th Division "Victory Division"
* 98th Division "Iroquois Division"
* 100th Division "Century Division"
* 104th Division "Timberwolf Division"
* 108th Division "Golden Griffons"