• Formations of the United States Army during the Mexican Revolution
  Formations of the United States Army during the Mexican Revolution
  The formations of the United States Army during the Mexican Revolution reflected the United States' desire to field modernized divisions to test the United States' preparedness for war...
  
  
• Formations of the United States Army during World War I
  Formations of the United States Army during World War I
  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:*First United States Army*Second United States Army*Third United States Army...
  
  
• Formations of the United States Army during World War II
  Formations of the United States Army during World War II
  This is a list of formations of the United States Army during the Second World War. Many of these formations still exist today, though many by different designations...
  
  
• Formations of the United States Army during the Vietnam War
  Formations of the United States Army during the Vietnam War
  The following is a list of divisions of the United States Army during the Vietnam War.- Airborne Divisions :* 82nd Airborne Division* 101st Airborne Division- Infantry Divisions :* 1st Infantry Division* 4th Infantry Division* 5th Infantry Division...
  
  
• Formations of the United States Army during the War on Terrorism
  Formations of the United States Army during the War on Terrorism
  After the end of Operation Desert Storm/Shield, the US Army inactivated many units. The units fighting the War on Terrorism are the survivors of the "Peace Dividend". While additional fighting brigades are being created, no additional deployable higher headquarters units are planned. This list is...
  
  
• Formations of the United States Army (current)

Army Groups

• 1st Army Group (World War II
  World War II
  World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
  
   "phantom
  Operation Quicksilver (WWII)
  In World War II, Operation Quicksilver was a sub-plan of Operation Fortitude, the 1944 deception plan designed to induce the Germans to hold troops away from Normandy in belief that the Normandy landing was only a feint and that the major invasion would come in the Pas-de-Calais...
  
  " formation)
• 6th Army Group
• 12th Army Group
• 15th Army Group

Field Armies

• First Allied Airborne Army
  First Allied Airborne Army
  The First Allied Airborne Army was an Allied formation formed on 2 August 1944 by the order of General Dwight D. Eisenhower, the Supreme Allied Commander of the Allied Expeditionary Force. The formation was part of the Allied Expeditionary Force and controlled all Allied airborne forces in Western...
  
  
• First United States Army—U.S. Army Training, Readiness, and Mobilization Command command formation
• Second United States Army
• Third United States Army—United States Army Central
  United States Army Central
  United States Army Central is an Army Service Component Command of the United States Army and is also dual-hatted as the "United States Third Army". It is the Army Component of U.S...
  
   command formation
• Fourth United States Army
• Fifth United States Army—United States Army North
  United States Army North
  United States Army North, or the Fifth Army, is an Army Service Component Command of the United States Army. It is responsible for homeland defense and defense support of civil authorities as the joint force land component command of United States Northern Command.-History:The Fifth United States...
  
   command formation
• Sixth United States Army—United States Army South
  United States Army South
  United States Army South is the Army's service component command of United States Southern Command whose area of focus includes 31 nations and 10 territories in Latin America and the Caribbean. It is headquartered at Fort Sam Houston, Texas.-Mission:...
  
   command formation
• Seventh United States Army—United States Army Europe
  United States Army Europe
  United States Army Europe and Seventh Army, is an Army Service Component Command of the United States Army and the land component of United States European Command. It is the largest American formation in Europe.-Invasion of Sicily:...
  
   command formation
• Eighth United States Army—United States Army Korea command formation
• Ninth United States Army
• Tenth United States Army
• Fourteenth United States Army (World War II "phantom" formation)
• Fifteenth United States Army

Army Corps

Armored Corps

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

Army Corps

• I Corps
• II Corps
• III Corps
• IV Corps
  IV Corps (United States)
  The IV Corps replaced the VI Corps in the Fifth United States Army's order of battle in Italy after Allied forces liberated Rome in the summer of 1944 when VI Corps was withdrawn to take part in Operation Dragoon, the Allied invasion of southern France. Initially the Corps had two divisions, U.S...
  
  
• V Corps

• VI Corps
• VII Corps
• VIII Corps
  VIII Corps (United States)
  The U.S. VIII Corps was a corps of the United States Army that saw service during various times over a fifty-year period during the twentieth century. The VIII Corps was organized 26–29 November 1918 in the Regular Army in France and demobilized on 20 April 1919. The VIII Corps was soon...
  
  
• IX Corps
• X Corps

• XIII Corps
• XIV Corps
• XV Corps
  XV Corps (United States)
  The XV Corps of the US Army was initially constituted on 1 October 1933 as part of the Organized Reserves, and was activated on 15 February 1943 at Camp Beauregard, Louisiana. During the Second World War, XV Corps fought for 307 days in the European Theater of Operations, fighting from Normandy...
  
  
• XVI Corps
• XVII Corps

• XIX Corps
  XIX Corps (United States)
  XIX Corps started as the III Armored Corps at Camp Polk, Louisiana on 20 August 1942 under the command of Major General Willis D. Crittenberger....
  
  
• XX Corps
  XX Corps (United States)
  The XX Corps of the United States Army fought from northern France to Austria in World War II. Constituted by redesignating the IV Armored Corps, which had been activated at Camp Young, California on 5 September 1942, XX Corps became operational in France as part of Lieutenant General George S....
  
  
• XXI Corps
  XXI Corps (United States)
  Initially constituted on 2 December 1943 in the Army of the United States, the XXI Corps was activated on 6 December 1943 at Camp Polk, Louisiana. XXI Corps fought for 116 days in the European Theater of Operations, fighting from Alsace through southern Germany and into Austria. The corps was...
  
  
• XXII Corps
• XXIII Corps

• XXIV Corps
• XXXVI Corps (1944–1945)

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 (1946–1952)
• 82nd Airborne Division "All American"
• 84th Airborne Division (1946–1952)
• 100th Airborne Division (1946–1952)
• 101st Airborne Division
  101st Airborne Division
  The 101st Airborne Division—the "Screaming Eagles"—is a U.S. Army modular light infantry division trained for air assault operations. During World War II, it was renowned for its role in Operation Overlord, the D-Day landings on 6 June 1944, in Normandy, France, Operation Market Garden, the...
  
  "Screaming Eagles"
• 108th Airborne Division (1946–1952), 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
  1st Armored Division (United States)
  The 1st Armored Division—nicknamed "Old Ironsides"—is a standing armored division of the United States Army with base of operations in Fort Bliss, Texas. It was the first armored division of the U.S...
  
  "Old Ironsides"
• 2nd Armored Division "Hell On Wheels"
• 3rd Armored Division
  U.S. 3rd Armored Division
  The 3rd Armored Division was an armored division of the United States Army. Nickamed the Third Herd, the division was first activated in 1941, and was active in the European Theater of World War II. The division was stationed in West Germany for much of the Cold War, and participated in the...
  
   "Spearhead Division"
• 4th Armored Division
  U.S. 4th Armored Division
  The 4th Armored Division of the United States Army was an armored division that compiled a distinguished career in the European theater of World War II. Unlike many other World War II U.S. armored divisions, the 4th never adopted an official divisional nickname or slogan...
  
   "Breakthrough Division"
• 5th Armored Division
  U.S. 5th Armored Division
  The 5th Armored Division was an armored formation of the United States Army active from 1941 to 1945 and from 1950 to 1956.-History:...
  
   "Victory"
• 6th Armored Division
  U.S. 6th Armored Division
  The 6th Armored Division was an armored division of the United States Army during World War II. It was formed with a cadre from the 2nd Armored Division. 6th AD was formed under the 1942 Table of Organization and Equipment.-History:...
  
   "Super Sixth", "Bulgebusters"
• 7th Armored Division
  U.S. 7th Armored Division
  The 7th Armored Division was an armored division of the United States Army in World War II.-Activation and organization:...
  
   "Lucky Seventh"
• 8th Armored Division "Showhorse"
• 9th Armored Division "The Phantom Division"
• 10th Armored Division
  U.S. 10th Armored Division
  The 10th Armored Division was an armored division of the United States Army in World War II. During the European Theater of Operations the 10th Armored Division was part of the Twelfth United States Army Group and was originally assigned to General George S. Patton’s Third United States Army...
  
   "Tiger Division"
• 11th Armored Division
  U.S. 11th Armored Division
  The US 11th Armored Division was a division of the United States Army in World War II. It was activated on 15 August 1942 at Camp Polk, Louisiana and moved on 24 June 1943 for the Louisiana Maneuvers...
  
   "Thunderbolt Division"
• 12th Armored Division
  U.S. 12th Armored Division
  The 12th Armored Division was an armored division of the United States Army in World War II.-History:The division was activated on 15 September 1942....
  
   "Hellcat Division"
• 13th Armored Division
• 14th Armored Division
  U.S. 14th Armored Division
  The 14th Armored Division was an armored division of the United States Army in World War II. It remains on the permanent rolls of the Regular Army as an inactive division, and is eligible for reactivation should the need ever arise...
  
  
• 15th Armored Division (phantom World War II division)
• 16th Armored Division
• 18th Armored Division (unorganized World War II division)
• 19th Armored Division (unorgainzed 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
  48th Armored Division
  The 48th Armored Division was a division of the United States Army National Guard from September 1946 until 1968. Most of its units were located within the Florida Army National Guard and the Georgia Army National Guard.-History:...
  
   (Georgia Army National Guard
  Georgia Army National Guard
  The Georgia Army National Guard is the Army National Guard component of the Georgia National Guard, administratively part of the Georgia Department of Defense. It consists of more than 11,100 Citizen-Soldiers training in more than 79 hometown armories and regional facilities across the state...
  
   to 1967)
• 49th Armored Division
  U.S. 49th Armored Division
  The 49th Armored Division —nicknamed the Lone Star— was one of two armored divisions of the United States Army National Guard, redesignated from the 36th Infantry Division after World War II, and organized and federally recognized on 24 February 1947.-History:The 49th was ordered to active federal...
  
   "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
  15th Cavalry Division (United States)
  The 15th Cavalry Division was created with the 1st & 2nd Cavalry Brigades in February 1917 at Fort Sam Houston, Texas. It numbered in succession of the 1st–14th Divisions, which were not all active at its creation. Originally trained for deployment to Europe, its units were later converted into...
  
   (Later redesignated as 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

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
  20th Division (United States)
  There have been two 20th Divisions in the history of the United States Army.In early 1917, the 20th Division was established as a National Guard formation consisting of units of the Idaho, Montana, Oregon, Washington, and Wyoming Army National Guards...
  
   (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
  26th Infantry Division (United States)
  The 26th Infantry Division was an infantry division of the United States Army. As a major formation of the Massachusetts Army National Guard, it was based in Boston, Massachusetts for most of its history...
  
   "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
  39th Infantry Division (United States)
  The 39th Infantry Division was an infantry division of the Army National Guard, originally formed as the 18th Division in 1917. The Division consisted of troops from Arkansas, Louisiana, and Mississippi. After training at Camp Beauregard, Louisiana, the Division was deployed to France but did not...
  
   "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)
  46th Infantry Division (United States)
  The 46th Infantry Division was a formation of the Michigan Army National Guard active between 1947 and 1968. It was initially headquartered at Lansing. Many of its units had previously been part of the 32nd Infantry Division. It was converted to the Reorganization Objective Army Division structure...
  
   (phantom World War II division, postwar National Guard formation)
• 47th Infantry Division
  47th Infantry Division (United States)
  The 47th Infantry Division was a formation of the Army National Guard active from 1946 to 1991. The Division was created on 10 June 1946 as a National Guard infantry division from the efforts of Minnesota's Adjutant General Ellard Walsh...
  
   (Post-war National Guard Division nicknamed "Viking")
• 48th Infantry Division (United States) (phantom World War II division, postwar National Guard formation)
• 49th Infantry Division
  49th Infantry Division (United States)
  The 49th Infantry Division was a unit of the United States Army formed from the 52nd Infantry Division.The 52nd Infantry Division was activated on 15 August 1946, and was allocated to the State of California as a National Guard division during the post World War II demobilization. The division was...
  
   (Post-war National Guard Division nicknamed "49'ers")
• 50th Infantry Division (phantom World War II division)
• 51st Infantry Division
  51st Infantry Division (United States)
  Assigned to the Florida and South Carolina National Guards immediately following World War II.Source: Wilson, John B. . Maneuver and Firepower: The Evolution of Divisions and Separate Brigades. Washington, DC: Center of Military History....
  
   (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 (unorganized World War II division)
• 62rd Infantry Division (unorganized World War II division)
• 63rd Infantry Division
• 65th Infantry Division
• 66th Infantry Division
• 67th Infantry Division (unorganized World War II division)
• 68th Infantry Division (unorganized World War II division)
• 69th Infantry Division
• 70th Infantry Division "Trailblazers"
• 71st Infantry Division "Red Circle"
• 72nd Infantry Division (unorganized World War II division)
• 73rd Infantry Division (unorganized World War II division)
• 74th Infantry Division (unorganized World War II division)
• 75th Infantry Division
• 76th Infantry Division "Liberty Bell Division"
• 77th Infantry Division "Metropolitan Division" also "Statue of Liberty Division"
• 78th Infantry Division
  U.S. 78th Infantry Division
  The 78th Infantry Division is a unit of the United States Army which served in World War I and World War II, and remains on the organized rolls.-Lineage:*Constituted 5 August 1917 in the National Army as Headquarters, 78th 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
  101st Airborne Division (United States)
  The 101st Airborne Division—the "Screaming Eagles"—is a U.S. Army modular light infantry division trained for air assault operations. During World War II, it was renowned for its role in Operation Overlord, the D-Day landings on 6 June 1944, in Normandy, France, Operation Market Garden, the...
  
   (Later Airborne Division with same number)
• 102nd Infantry Division "Ozark Division"
• 103rd Infantry Division "Cactus Division"
• 104th Infantry Division "Timberwolf"
• 105th Infantry Division (unorganized World War II division)
• 106th Infantry Division "Golden Lion Division"
• 107th Infantry Division (unorganized World War II division)
• 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
  Americal Division
  The 23rd Infantry Division, more commonly known as the Americal Division of the United States Army was formed in May 1942 on the island of New Caledonia. In the immediate emergency following Pearl Harbor, the United States had hurriedly sent three individual regiments to defend New Caledonia...
  
  )
• 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)

Reserve Training Divisions

• 75th Division
• 78th Division
  U.S. 78th Infantry Division
  The 78th Infantry Division is a unit of the United States Army which served in World War I and World War II, and remains on the organized rolls.-Lineage:*Constituted 5 August 1917 in the National Army as Headquarters, 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"