# Unità dell'United States Army

Questo è un elenco storico delle unità dell'United States Army. Le unità ancora attive sono segnate in grassetto.

## Gruppi d'Armata

* 1st Army Group (esercito "fantasma" creato per depistare i tedeschi (operazione Quicksilver) prima dello sbarco in Normandia, nel piano dell'operazione Fortitude)
* 6th Army Group
* 12th Army Group
* 15th Army Group

## Armate

* First Allied Airborne Army
* First United States Army— Unità di comando per addestramento, pronta risposta e mobilitazione
* Second United States Army
* Third United States Army- Comando centrale dell'US Army
* Fourth United States Army
* Fifth United States Army— Comando dell'United States Army North
* Sixth United States Army— Comando dell'United States Army South
* Seventh United States Army— Comando dell'United States Army Europe
* Eighth United States Army— Comando dell'United States Army Korea
* Ninth United States Army
* Tenth United States Army
* Fourteenth United States Army (unità "fantasma" della seconda guerra mondiale)
* Fifteenth United States Army

## Corpi d'armata

Paracadutisti, forze corazzate e fanteria sono raggruppati separatamente. Il sistema di numero per il corpo aviotrasportato è una continuazione del sistema di numerazione della fanteria.

### Corpi aviotrasportati

* XVIII Airborne Corps

## Corpi corazzati

* I Armored Corps (ora Seventh Army)
* II Armored Corps (ora XVIII Airborne Corps)
* III Armored Corps (ora III Corps)
* IV Armored Corps

### Corpi d'armata di fanteria

* I Corps
* II Corps
* III Corps
* IV Corps
* V Corps
* VI Corps
* VII Corps
* VIII Corps
* IX Corps
* X 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 (1944–1945)

## Divisioni
### Divisioni d'assalto aereo

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

### Divisioni paracadutisti

* 6th Airborne Division (divisione fantasma della seconda guerra mondiale)
* 9th Airborne Division (divisione fantasma della seconda guerra mondiale)
* 11th Airborne Division "Angels"
* 13th Airborne Division "Lucky Thirteenth"
* 15th Airborne Division (unità non organizzata della seconda guerra mondiale)
* 17th Airborne Division "Golden Talons"
* 18th Airborne Division (divisione fantasma della seconda guerra mondiale)
* 21st Airborne Division (divisione fantasma della seconda guerra mondiale
* 80th Airborne Division (1946–1952)
* 82nd Airborne Division "All American"
* 84th Airborne Division (1946–1952)
* 100th Airborne Division (1946–1952)
* 101st Airborne Division "Screaming Eagles"
* 108th Airborne Division (1946–1952), poi divisione dell'Army Reserve
* 135th Airborne Division (divisione fantasma della seconda guerra mondiale)

### Divisioni corazzate

* 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 (divisione fantasma)
* 16th Armored Division
* 18th Armored Division (divisione non organizzata della seconda guerra mondiale)
* 19th Armored Division (unorgainzed World War II division)
* 20th Armored Division
* 21st Armored Division (divisione non organizzata della seconda guerra mondiale)
* 22nd Armored Division (divisione non organizzata della seconda guerra mondiale)
* 25th Armored Division (divisione fantasma)
* 27th Armored Division
* 30th Armored Division
* 39th Armored Division (divisione fantasma)
* 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

### Divisioni di cavalleria

* Cavalry Division — mai numerata
* 1st Cavalry Division
* 2nd Cavalry Division
* 3rd Cavalry Division
* 15th Cavalry Division poi 1st Cavalry Division
* 21st Cavalry Division
* 22nd Cavalry Division
* 23rd Cavalry Division
* 24th Cavalry Division
* 61st Cavalry Division
* 62rd Cavalry Division
* 63rd Cavalry Division
* 64th Cavalry Division
* 65th Cavalry Division
* 66th Cavalry Division

### Divisioni di fanteria

* 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 (divisione fantasma)
* 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 (divisione fantasma)
* 20th Division (World War I)
* 22nd Infantry Division (divisione fantasma)
* 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 Army) (phantom World War II division, postwar National Guard formation)
* 47th Infantry Division (Post-war National Guard Division nicknamed "Viking")
* 48th Infantry Division (United States Army) (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 (divisione non organizzata della seconda guerra mondiale)
* 62rd Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 63rd Infantry Division
* 65th Infantry Division
* 66th Infantry Division
* 67th Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 68th Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 69th Infantry Division
* 70th Infantry Division "Trailblazers"
* 71st Infantry Division "Red Circle"
* 72nd Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 73rd Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 74th Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 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"
* 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"
* 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
* 102nd Infantry Division "Ozark Division"
* 103rd Infantry Division "Cactus Division"
* 104th Infantry Division "Timberwolf"
* 105th Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 106th Infantry Division "Golden Lion Division"
* 107th Infantry Division (divisione non organizzata della seconda guerra mondiale)
* 108th Infantry Division (divisione fantasma}
* 109th Infantry Division (divisione fantasma)
* 112th Infantry Division (divisione fantasma)
* 119th Infantry Division (divisione fantasma)
* 125th Infantry Division (divisione fantasma)
* 130th Infantry Division (divisione fantasma)
* 141st Infantry Division (divisione fantasma)
* 157th Infantry Division (divisione fantasma)
* Americal Division (see 23rd Infantry Division)
* Hawaiian Division (see also: 24th Infantry Division; 25th Infantry Division)
* Maneuver Division (1911)
* Panama Canal Division (inattiva dal 1932)
* Philippine Division (12th Infantry Division)

### Divisioni leggere

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

### Divisioni di alpini

* 10th Mountain Division

### Divisioni di riserva ed addestramento

* 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"