This is a list of formations of the United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 during the Second World War. Many of these formations still exist today, though many by different designations. Included are formations that were placed on rolls, but never organized, as well as "phantom" formations used in the Allied

Allies of World War II

The Allies of World War II were the countries that opposed the Axis powers during the Second World War . Former Axis states contributing to the Allied victory are not considered Allied states...

 Operation Quicksilver

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...

 deception of 1944—these are marked accordingly.

Army Groups

• 1st Army Group ("phantom" formation)
• 6th Army Group
  U.S. 6th Army Group
  The Sixth United States Army Group was an Army Group of the Allies during World War II, and as contained armies from both the United States Army and the French Army it is also referred to as the Southern Group of Armies.-History:...
  
  
• 12th Army Group
  U.S. 12th Army Group
  The Twelfth United States Army Group was the largest and most powerful United States Army formation ever to take to the field. It controlled the majority of American forces on the Western Front in 1944 and 1945...
  
  
• 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
• Second United States Army
• Third United States Army
• Fourth United States Army
• Fifth United States Army
• Sixth United States Army
• Seventh United States Army
• Eighth United States Army
• Ninth United States Army
• Tenth United States Army
• Fourteenth United States Army ("phantom" formation)
• Fifteenth United States Army

Army Corps

• I Corps
  U.S. I Corps
  I Corps is a corps of the United States Army headquartered in Joint Base Lewis-McChord, Washington. It is a major formation of United States Army Forces Command....
  
  
• II Corps
  U.S. II Corps
  The II Corps was a corps of the United States Army and the first US formation of any size to see combat in Europe or Africa during World War II.-World War I:...
  
  
• III Corps
  U.S. III Corps
  III Corps is a corps of the United States Army headquartered at Fort Hood, Texas. It is a major formation of the United States Army Forces Command....
  
  
• IV Corps
• V Corps
• VI Corps
  U.S. VI Corps
  The VI Corps was activated as VI Army Corps in August 1918 at Neufchâteau, France, serving in the Lorraine Campaign. Constituted in the Organized Reserves in 1921, it was allotted to the Regular Army in 1933 and activated on 1 August 1940 at Fort Sheridan, Illinois...
  
  
• VII Corps
  U.S. VII Corps
  The VII Corps of the United States Army was one of the two principal corps of the army in Europe during the Cold War, along with V Corps. Activated in 1918, it was subordinate to the Seventh Army, or USAREUR, throughout most of its existence and based outside of Stuttgart, West Germany, until...
  
  
• VIII Corps
• IX Corps
  U.S. IX Corps
  IX Corps was a corps of the United States Army. For most of its operational history, IX Corps was headquartered in or around Japan and subordinate to US Army commands in the Far East....
  
  
• X Corps
  U.S. X Corps
  X Corps was a corps of the United States Army in World War II and the Korean War.-World War II:The X Corps was activated in May 1942 at Sherman, Texas...
  
  
• XI Corps
• XII Corps
• XIII Corps
  U.S. XIII Corps
  Activated on 7 December 1942 in Providence, Rhode Island, the XIII Corps fought for 180 days in the European Theater of Operations, fighting from the Netherlands to the Elbe River. It was first activated under the command of then-Major General Emil F. Reinhardt, but would be commanded in combat by...
  
  
• XIV Corps
  U.S. XIV Corps
  Constituted 1 October 1933 in the Organized Reserves. The history of XIV Army Corps in World War II dates from December, 1942. Under Lieutenant General Alexander M...
  
  
• XV Corps
• XVI Corps
• XVIII Corps
  U.S. XVIII Airborne Corps
  The XVIII Airborne Corps is the corps of the United States Army designed for rapid deployment anywhere in the world. It is referred to as "America's Contingency Corps". Its headquarters are at Fort Bragg, North Carolina.-World War II:...
  
  
• XIX Corps
• XX Corps
• XXI Corps
• XXII Corps
  U.S. XXII Corps
  The XXII Corps was a corps of the United States Army during World War II and the Cold War, and as II Field Force, Vietnam, the Vietnam War.-Lineage:...
  
  
• XXIII Corps
• XIV Corps
  U.S. XXIV Corps
  XXIV Corps was a U.S. Army Corps-level command during World War II and the Vietnam War.XXIV Corps was activated at Fort Shafter, Hawaii, on 8 April 1944. It participated in the invasion of Leyte in the Philippine Islands on 20 October 1944, with the 7th Infantry Division and 96th Infantry Division...
  
  
• XXXIII Corps("phantom" formation)
• XXXVI Corps
• XXXVII Corps("phantom" formation)

Army Divisions

Airborne

Airborne forces

Airborne forces are military units, usually light infantry, set up to be moved by aircraft and 'dropped' into battle. Thus they can be placed behind enemy lines, and have an ability to deploy almost anywhere with little warning...

, armored, cavalry

Cavalry

Cavalry or horsemen were soldiers or warriors who fought mounted on horseback. Cavalry were historically the third oldest and the most mobile of the combat arms...

, infantry

Infantry

Infantrymen are soldiers who are specifically trained for the role of fighting on foot to engage the enemy face to face and have historically borne the brunt of the casualties of combat in wars. As the oldest branch of combat arms, they are the backbone of armies...

, and mountain divisions are grouped separately. The numbering system for the airborne and mountain divisions are a continuation of the infantry numbering system—"phantom" formations are an exception to that numbering system.

Airborne Divisions

• 6th Airborne Division ("phantom" formation)
• 9th Airborne Division ("phantom" formation)
• 11th Airborne Division
  U.S. 11th Airborne Division
  -Knollwood Maneuver:The 11th Airborne, as the attacking force, was assigned the objective of capturing Knollwood Army Auxiliary Airfield near Fort Bragg in North Carolina. The force defending the airfield and its environs was a combat team composed of elements of the 17th Airborne Division and a...
  
  
• 13th Airborne Division
  U.S. 13th Airborne Division
  The 13th Airborne Division was an airborne formation in the United States Army during World War II, and was commanded by Major General Eldridge Chapman. It was officially activated in August 1943 at Fort Bragg in North Carolina, remaining active until February 1946, but never saw combat.After...
  
  
• 15th Airborne Division (unorganized)
• 17th Airborne Division
  U.S. 17th Airborne Division
  The 17th Airborne Division was an airborne unit in the United States Army during World War II, and was commanded by Major General William M. Miley. It was officially activated as an airborne division in April 1943 but was not immediately shipped out to a combat theater, remaining in the United...
  
  
• 18th Airborne Division ("phantom" formation)
• 21st Airborne Division ("phantom" formation)
• 82nd Airborne Division
  U.S. 82nd Airborne Division
  The 82nd Airborne Division is an active airborne infantry division of the United States Army specializing in parachute landing operations. Based at Fort Bragg, North Carolina, the 82nd Airborne Division is the primary fighting arm of the XVIII Airborne Corps....
  
  
• 101st Airborne Division
• 135th Airborne Division ("phantom" formation)

Armored Divisions

• 1st Armored Division
  U.S. 1st Armored Division
  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...
  
  
• 2nd Armored Division
  U.S. 2nd Armored Division
  The 2nd Armored Division was an armored division of the United States Army. The division played an important role during World War II in the invasions of North Africa and Sicily and the liberation of France, Belgium, and Holland and the invasion of Germany...
  
  
• 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...
  
  
• 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...
  
  
• 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:...
  
  
• 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:...
  
  
• 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:...
  
  
• 8th Armored Division
  U.S. 8th Armored Division
  The 8th Armored Division was an armored division of the United States Army that served in the European Theater of World War II.-Stateside:The devastating successes of the German armored units in Poland and France underscored America's need for an effective armored force...
  
  
• 9th Armored Division
  U.S. 9th Armored Division
  The 9th Armored Division was an armored division of the United States Army in World War II. In honor of their World War II service, the 9th was officially nicknamed the "Phantom Division."-History:...
  
  
• 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...
  
  
• 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...
  
  
• 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....
  
  
• 13th Armored Division
  U.S. 13th Armored Division
  The 13th Armored Division was an armored division of the United States Army in World War II.-History:The division was activated on 15 October 1942 at Camp Beale, California, East of Marysville....
  
  
• 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" formation)
• 16th Armored Division
  U.S. 16th Armored Division
  The 16th Armored Division was an armored division of the United States Army in World War II.-Table of Organization:HHC#BG John L. Pierce – September, 1944 – 15 October 1945-Association:*16th Armored Division Association*2517 Connecticut Avenue...
  
  
• 18th Armored Division (unorganized)
• 19th Armored Division (unorganized)
• 20th Armored Division
  U.S. 20th Armored Division
  The 20th Armored Division was an armored division of the United States Army in World War II. It was activated on 15 March 1943 at Camp Campbell in Kentucky. The Division has no real nickname although it did associate itself with the nickname "Armoraiders" while in training at Camp Campbell...
  
  
• 21st Armored Division (unorganized)
• 22nd Armored Division (unorganized)
• 39th Armored Division ("phantom" formation)

Cavalry Divisions

• 1st Cavalry Division
• 2nd Cavalry Division

Infantry Divisions

• 1st Infantry Division
• 2nd Infantry Division
• 3rd Infantry Division
• 4th Infantry Division
• 5th Infantry Division
• 6th Infantry Division
• 7th Infantry Division
• 8th Infantry Division
• 9th Infantry Division
• 11th Infantry Division ("phantom" formation)
• 14th Infantry Division ("phantom" formation)
• 22nd Infantry Division ("phantom" formation)
• 24th Infantry Division
• 25th Infantry Division
• 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...
  
  
• 27th Infantry Division
• 28th Infantry Division
• 29th Infantry Division
• 30th Infantry Division
• 31st Infantry Division
• 32nd Infantry Division
• 33rd Infantry Division
• 34th Infantry Division
• 35th Infantry Division
• 36th Infantry Division
• 37th Infantry Division
• 38th Infantry Division
• 40th Infantry Division
• 41st Infantry Division
• 42nd Infantry Division
• 43rd Infantry Division
• 44th Infantry Division
• 45th Infantry Division
• 46th Infantry Division ("phantom" formation)
• 48th Infantry Division ("phantom" formation)
• 50th Infantry Division ("phantom" formation)
• 55th Infantry Division ("phantom" formation)
• 59th Infantry Division ("phantom" formation}
• 61st Infantry Division (unorganized)
• 62nd Infantry Division (unorganized)
• 63rd Infantry Division
• 65th Infantry Division
• 66th Infantry Division
• 67th Infantry Division (unorganized)
• 68th Infantry Division (unorganized)
• 69th Infantry Division
• 70th Infantry Division
• 71st Infantry Division
• 72nd Infantry Division (unorganized)
• 73rd Infantry Division (unorganized)
• 74th Infantry Division (unorganized)
• 75th Infantry Division
• 76th Infantry Division
• 77th Infantry 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...
  
  
• 79th Infantry Division
  U.S. 79th Infantry Division
  The 79th Infantry Division The 79th Infantry Division The 79th Infantry Division ("Cross of Lorraine" was a unit of the United States Army in World War I and World War II.-World War I:*Activated: August 1917*Overseas: July 1918*Major Operations: Meuse-Argonne...
  
  
• 80th Infantry Division
• 81st Infantry Division
• 83rd Infantry Division
  U.S. 83rd Infantry Division
  The 83rd Infantry Division was a formation of the United States Army in World War I and World War II.-World War I:The division was activated in September 1917, and went overseas in June 1918. It was designated a depot division. Thus it supplied over 195,000 officers and enlisted men as...
  
  
• 84th Infantry Division
• 85th Infantry Division
• 86th Infantry Division
  U.S. 86th Infantry Division
  The 86th Infantry Division was a unit of the United States Army in World War I and World War II.-World War I:*Combat: Saw no combat; was activated 25 August 1917 at Camp Grant in Rockford, Illinois, went overseas in August 1918, returned to United States in November 1918, and was inactivated in...
  
  
• 87th Infantry Division
  U.S. 87th Infantry Division
  The 87th Infantry Division was a unit of the United States Army in World War I and World War II.-World War I:*87th Division was a National Army division allocated to Arkansas, Louisiana and Mississippi....
  
  
• 88th Infantry Division
• 89th Infantry Division
  U.S. 89th Infantry Division
  The 89th Infantry Division, known as the "Rolling W," was an infantry unit of the United States Army that was activated for service in World War I and World War II.-World War I:*Activated: August 1917.*Overseas: June 1918....
  
  
• 90th Infantry Division
  U.S. 90th Infantry Division
  The 90th Infantry Division was a unit of the United States Army that served in World War I and World War II.Its heraldic descendant is the 90th Sustainment Brigade.-World War I:*Activated: August 1917.*Overseas: June 1918....
  
  
• 91st Infantry Division
• 92nd Infantry Division
• 93rd Infantry Division
• 94th Infantry Division
  U.S. 94th Infantry Division
  The 94th Division was a unit of the United States Army in World War I, and of the Organized Reserve Corps in 1921 until 1942.The 94th Infantry Division was a unit of the United States Army in World War II, and of the United States Army Reserve from 1956 until 1963...
  
  
• 95th Infantry Division
  U.S. 95th Infantry Division
  The 95th Infantry Division was an infantry division of the United States Army. Today it exists as the 95th Training Division, a component of the United States Army Reserve headquartered at Fort Sill, Oklahoma....
  
  
• 96th Infantry Division
• 97th Infantry Division
  U.S. 97th Infantry Division
  The 97th Infantry Division was a unit of the United States Army in World War I and World War II.-World War I:The division was activated 5 September 1918 and inactivated 20 November 1918 ; one infantry regiment served with the 76th Division....
  
  
• 98th Infantry Division
• 99th Infantry Division
• 100th Infantry Division
• 102nd Infantry Division
  U.S. 102nd Infantry Division
  The 102d Infantry Division was a unit of the United States Army in World War II.-World War II:*Activated: 15 September 1942*Overseas: 12 September 1944*Campaigns: Rhineland, Central Europe*Days of combat: 173...
  
  
• 103rd Infantry Division
• 104th Infantry Division
• 106th Infantry Division
  U.S. 106th Infantry Division
  The 106th Infantry Division was a division of the United States Army, formed for service during World War II. Two of its three regiments were overrun and surrounded in the initial days of the Battle of the Bulge, and forced to surrender on 19 December 1944....
  
  
• 108th Infantry Division ("phantom" formation - activated following the war as the 108th Airborne Division)
• 109th Infantry Division ("phantom" formation)
• 112th Infantry Division ("phantom" formation)
• 119th Infantry Division ("phantom" formation)
• 125th Infantry Division ("phantom" formation)
• 130th Infantry Division ("phantom" formation)
• 141st Infantry Division ("phantom" formation)
• 157th Infantry Division ("phantom" formation)
• Americal 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...
  
  
• Philippine Division
  U.S. Philippine Division
  Philippine Division, or from 1944–45 the 12th Infantry Division, was the core U.S. Infantry Division of the United States Army's Philippine Department during World War II. On 31 July 1941, the division consisted of 10,473 troops, mostly enlisted Filipinos, known as the Philippine Scouts...