Unità dell'United States Army

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

• 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

• 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

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.

• XVIII Airborne Corps

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

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

• 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)

• 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

• 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

• 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)

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

• 10th Mountain Division

• 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"