This list of

United States Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cla ...

divisions is divided into three eras: 1911–1917, 1917–1941, and 1941–present. These eras represent the major evolutions of

army An army (from Old French ''armee'', itself derived from the Latin verb ''armāre'', meaning "to arm", and related to the Latin noun ''arma'', meaning "arms" or "weapons"), ground force or land force is a fighting force that fights primarily on ...

division structure (there have been several minor changes during these times). The 1911–1917 era lists divisions raised during the Army's first attempts at modernizing the division, prior to the authorization of permanent divisions, and the 1917–1941 era lists the first permanent divisions, prior to advent of specialized (armored, airborne, etc.) divisions. The 1941–present era lists all of the divisions organized, raised, or authorized since then. As much as possible, divisions are only listed in the eras in which they were first created. Some divisions, such as the 1st Cavalry Division, are listed in multiple eras, as their organizations were drastically changed from one era to the next. Many divisions overlap the years listed in the era categories, mainly due to the slow pace in which they were deactivated, inactivated, or otherwise disbanded. Several divisions have existed under multiple designations, such as the 10th Mountain Division (10th Light Division (Alpine), 10th Infantry Division). Additionally, several divisions with the same numerical designations were completely separate and unrelated divisions (there have been two 5th Divisions, for instance).

History

Divisions in the United States Army have existed since the

American Revolution The American Revolution was an ideological and political revolution that occurred in British America between 1765 and 1791. The Americans in the Thirteen Colonies formed independent states that defeated the British in the American Revolut ...

, but during the 18th and 19th centuries, these were temporary organizations. The concept of the permanent United States Army

division Division or divider may refer to: Mathematics *Division (mathematics), the inverse of multiplication *Division algorithm, a method for computing the result of mathematical division Military *Division (military), a formation typically consisting ...

was formulated and put to the test following the turn of the 20th century. In 1916, the permanent division would finally be authorized by

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of a ...

, resulting in a dramatic change in the Army's force structure. For the first time, the division was the base element of the United States Army and remained as such until the

Global War on Terrorism The war on terror, officially the Global War on Terrorism (GWOT), is an ongoing international counterterrorism military campaign initiated by the United States following the September 11 attacks. The main targets of the campaign are militant ...

, when the Army switched its emphasis to

brigade A brigade is a major tactical military formation that typically comprises three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute a division. Br ...

s and

brigade combat team The brigade combat team (BCT) is the basic deployable unit of maneuver in the U.S. Army. A brigade combat team consists of one combat arms branch maneuver brigade, and its assigned support and fire units. A brigade is normally commanded by a ...

s. Since the authorizations of permanent divisions, the United States Army has raised 128 separate divisions with unique lineages.

American Revolution

George Washington George Washington (February 22, 1732, 1799) was an American military officer, statesman, and Founding Father who served as the first president of the United States from 1789 to 1797. Appointed by the Continental Congress as commander of th ...

organized the first divisions of the United States Army on 22 July 1775 in

Boston Boston (), officially the City of Boston, is the state capital and most populous city of the Commonwealth of Massachusetts, as well as the cultural and financial center of the New England region of the United States. It is the 24th- mo ...

, Massachusetts. Arriving to take command of the

Siege of Boston The siege of Boston (April 19, 1775 – March 17, 1776) was the opening phase of the American Revolutionary War. New England militiamen prevented the movement by land of the British Army, which was garrisoned in what was then the peninsular town ...

, he split the forces there into three divisions, each composed of two

s of six to seven

regiments A regiment is a military unit. Its role and size varies markedly, depending on the country, service and/or a specialisation. In Medieval Europe, the term "regiment" denoted any large body of front-line soldiers, recruited or conscripted ...

. These divisions were led by

major general Major general (abbreviated MG, maj. gen. and similar) is a military rank used in many countries. It is derived from the older rank of sergeant major general. The disappearance of the "sergeant" in the title explains the apparent confusion of a ...

s but with no assigned staff. They were primarily administrative but eventually evolved into semi-permanent tactical organizations.

American Civil War

During the

Civil War A civil war or intrastate war is a war between organized groups within the same state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies ...

, when the first large true

field armies A field army (or numbered army or simply army) is a military formation in many armed forces, composed of two or more corps and may be subordinate to an army group. Likewise, air armies are equivalent formation within some air forces, and withi ...

in United States history were formed, divisions were the

Union Army During the American Civil War, the Union Army, also known as the Federal Army and the Northern Army, referring to the United States Army, was the land force that fought to preserve the Union (American Civil War), Union of the collective U.S. st ...

's basic administrative and organizational unit.Wilson (1998), p. 12McGrath, p. 17-19 They were also the smallest "self-sufficient" units, each composed of two to six brigades. These were typically three brigades for infantry divisions and two brigades for cavalry divisions.Eicher, J., Eicher, D. (2002). Civil War High Commands. United States: Stanford University Press. p. 65 A division was typically commanded by a major general, but because Congress refused to promote officers past that grade (with the exception of promoting

Ulysses S. Grant Ulysses S. Grant (born Hiram Ulysses Grant ; April 27, 1822July 23, 1885) was an American military officer and politician who served as the 18th president of the United States from 1869 to 1877. As Commanding General, he led the Union Ar ...

lieutenant general Lieutenant general (Lt Gen, LTG and similar) is a three-star military rank (NATO code OF-8) used in many countries. The rank traces its origins to the Middle Ages, where the title of lieutenant general was held by the second-in-command on the ...

in 1864) major generals were also put in charge of field armies and corps, allowing some divisions to be commanded by

brigadier general Brigadier general or Brigade general is a military rank used in many countries. It is the lowest ranking general officer in some countries. The rank is usually above a colonel, and below a major general or divisional general. When appointed ...

s. Divisions were numbered sequentially within their corps, but were often referred to by the commander's name in official reports. When the

Army of the Potomac The Army of the Potomac was the principal Union Army in the Eastern Theater of the American Civil War. It was created in July 1861 shortly after the First Battle of Bull Run and was disbanded in June 1865 following the surrender of the Confedera ...

was first formed after the disastrous

First Battle of Bull Run The First Battle of Bull Run (the name used by Union forces), also known as the Battle of First Manassas

, the division was initially the largest unit. It consisted of three infantry brigades, a cavalry regiment, and four

artillery batteries In military organizations, an artillery battery is a unit or multiple systems of artillery, mortar systems, rocket artillery, multiple rocket launchers, surface-to-surface missiles, ballistic missiles, cruise missiles, etc., so grouped to faci ...

. However the cavalry and artillery were eventually spun off to their own units. When army corps were formally created in March 1862, half of the divisional artillery units were used to form an artillery reserve of three brigades for the army. After the Peninsula campaign the cavalry were removed from divisional control to form their own brigades under army control, until February 1863 when they were formed into a dedicated Cavalry Corps of three divisions, each with two brigades and assigned

horse artillery Horse artillery was a type of light, fast-moving, and fast-firing artillery which provided highly mobile fire support, especially to cavalry units. Horse artillery units existed in armies in Europe, the Americas, and Asia, from the early 17th to t ...

. Following Chancellorsville all artillery batteries were removed from divisional control to form brigades under corps control.Wilson (1998), p. 13Wilson (1998), p. 14 The evolution of divisions within the Army of the Potomac served as a model by which the other field armies in the Union organized themselves. In the beginning the division commander was allowed only an assistant

adjutant general An adjutant general is a military chief administrative officer. France In Revolutionary France, the was a senior staff officer, effectively an assistant to a general officer. It was a special position for lieutenant-colonels and colonels in staf ...

and three aides-de-camp as their staff. Administrative needs eventually led to the addition of a quartermaster, a commissary of subsistence, an ordnance officer, and a surgeon, all with the rank of

major Major (commandant in certain jurisdictions) is a military rank of commissioned officer status, with corresponding ranks existing in many military forces throughout the world. When used unhyphenated and in conjunction with no other indicators ...

. However, there were no enlisted personnel specifically assigned to support duties, instead requiring either line soldiers be detailed to carry them out or civilian workers employed. The former removed the combat effectiveness of the units they were taken from, while the latter were more difficult to find and replace and tended to be less reliable and obedient.Shrader, C. R., Newell, C. R. (2011). Of Duty Well and Faithfully Done: A History of the Regular Army in the Civil War. United States: Nebraska. p. 71

Designations

Prior to 1941, only

cavalry Historically, cavalry (from the French word ''cavalerie'', itself derived from "cheval" meaning "horse") are soldiers or warriors who fight mounted on horseback. Cavalry were the most mobile of the combat arms, operating as light cavalry ...

divisions were specifically designated;

infantry Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infantry, air assault infantry, and marine i ...

divisions were simply designated by "Division". Following the advent of the

armored Armour (British English) or armor (American English; see spelling differences) is a covering used to protect an object, individual, or vehicle from physical injury or damage, especially direct contact weapons or projectiles during combat Co ...

division, infantry divisions became officially designated by "Infantry Division" (with the 25th Infantry Division being the first constituted by the

as such). All of the 1917–1941 (non-cavalry) divisions, with the exceptions of the 10th through 20th and 101st Divisions, would be redesignated as Infantry Divisions at some point in the 1941–present era. Other than the aforementioned Armored, Cavalry, and Infantry, the only official Army division designations are

Air Assault Air assault is the movement of ground-based military forces by vertical take-off and landing (VTOL) aircraft—such as the helicopter—to seize and hold key terrain which has not been fully secured, and to directly engage enemy forces behind e ...

(one test division),

Airborne Airborne or Airborn may refer to: Arts, entertainment, and media Films * ''Airborne'' (1962 film), a 1962 American film directed by James Landis * ''Airborne'' (1993 film), a comedy–drama film * ''Airborne'' (1998 film), an action film sta ...

Light Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 tera ...

(three test divisions in

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

), Motorized (briefly authorized from 1942 to 1943), and

Mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited Summit (topography), summit area, and ...

. For lineage purposes, the 101st Airborne Division maintains its designation as an airborne division, though it is currently organized as an air assault division. Divisions listed with an additional identifier in parentheses ("alpine" or "test", for example) existed only with that identifier. Divisions that have held multiple additional identifiers, such as the 1st Cavalry ("

airmobile Air assault is the movement of ground-based military forces by vertical take-off and landing (VTOL) aircraft—such as the helicopter—to seize and hold key terrain which has not been fully secured, and to directly engage enemy forces behind e ...

", "heavy") and the 9th Infantry ("light", "motorized"), are left unidentified, regardless of their current additional identifier. An unspecified division today refers to a

United States Army Reserve The United States Army Reserve (USAR) is a Military reserve force, reserve force of the United States Army. Together, the Army Reserve and the Army National Guard constitute the Army element of the reserve components of the United States Armed F ...

training division. * (*) denotes divisions that reorganized under a different division designation while still active * Bold denotes current United States Army divisions

Divisions of the United States Army (1911–17)

* Maneuver Division (1911) – see

History of the United States Army The history of the United States Army began in 1775. From its formation, the United States Army has been the primary land based part of the United States Armed Forces. The Army's main responsibility has been in fighting land battles and military ...

;Regular Army 1913–16 * 1st Division (Eastern Department) * 2nd Division (Central Department) * 3rd Division (Western Department) *

Cavalry Division Historically, cavalry (from the French word ''cavalerie'', itself derived from "cheval" meaning "horse") are soldiers or warriors who Horses in warfare, fight mounted on horseback. Cavalry were the most mobile of the combat arms, operating a ...

: authorized as the Regular Army division for the Southern Department in 1913; never officially numerically designated. *

Punitive Expedition A punitive expedition is a military journey undertaken to punish a political entity or any group of people outside the borders of the punishing state or union. It is usually undertaken in response to perceived disobedient or morally wrong behavio ...

: (provisional division): 1916–17 ;National Guard 1914–17 * 5th Division * 6th Division * 7th Division *

8th Division 8th Division, 8th Infantry Division or 8th Armored Division may refer to: Infantry divisions * 8th Division (Australia) * 8th Canadian Infantry Division * 8th Air Division (People's Republic of China) * 8th Division (1st Formation) (People's Rep ...

* 9th Division * 10th Division * 11th Division * 12th Division * 13th Division * 14th Division * 15th Division * 16th Division

National Defense Act of 1916

The National Defense Act of 1916 provided that the "Army of the United States" would consist of the Regular Army, the Volunteer Army, the Officers' Reserve Corps, the Enlisted Reserve Corps, the National Guard in the service of the United States, and such other land forces as were or might be authorized by Congress. The president was to determine both the number and type of National Guard units that each state would maintain. Both the Regular Army and the National Guard were to be organized, insofar as practicable, into permanent brigades and divisions. * 5th Division: 1917* (26th Division) * 6th Division: 1917* (27th Division) * 7th Division: 1917* (28th Division) *

: 1917* (29th Division) * 9th Division: 1917* (30th Division) * 10th Division: 1917* (31st Division) * 11th Division: 1917* (32nd Division) * 12th Division: 1917* (33rd Division) * 13th Division: 1917* (34th Division) * 14th Division: 1917* (35th Division) * 15th Division: 1917* (36th Division) * 16th Division: 1917* (37th Division) * 17th Division: 1917* (38th Division) * 18th Division: 1917* (39th Division) * 19th Division: 1917* (40th Division) * 20th Division: 1917* (41st Division)

Divisions of the United States Army (1917 to 1941)

Cavalry divisions

In 1940, the National Guard voluntarily withdrew their allotment of the 21st through 24th Cavalry Divisions, partially in response to the Army's decision that the National Guard did not need four Cavalry Divisions and the Army's unwillingness to allot the National Guard armored divisions. The 61st through 66th Cavalry Divisions were inactivated in 1942. * 1st Cavalry Division SSI (1921-2015)

1st Cavalry Division: 1921–present * US 2nd Cavalry Division

2nd Cavalry Division: Unorganized. A 2nd Cavalry Division was constituted in 1921, but would remain unorganized until World War II. * 3rd Cavalry Division: Unorganized. The 3rd Cavalry Division was placed on rolls in 1927 to complete an intended Cavalry Corps, but was never organized. * 15th Cavalry Division: 1917–18 * 21st Cavalry Division: 1921–40 * 22nd Cavalry Division: 1921–40 * 23rd Cavalry Division: 1921–40 * 24th Cavalry Division: 1921–40 * 61st Cavalry Division: 1921–42 * 62nd Cavalry Division: 1921–42 * 63rd Cavalry Division: 1921–42 * 64th Cavalry Division: 1921–42 * 65th Cavalry Division: 1921–42 * 66th Cavalry Division: 1921–42

Infantry divisions

Various elements of the 4th through 9th Divisions remained on active duty until those divisions' full activation prior to World War II. The 76th through 91st and 94th through 104th Divisions existed primarily as officer billets with enlisted cadre; they were not completely reactivated until America's entry into World War II. The infantry brigades, field artillery brigades, and several other of the subordinate units of the Panama Canal, Hawaiian, and Philippine Divisions were numbered accordingly with what should have been the 10th, 11th, and 12th Divisions. * 1st Division (later 1st Infantry Division): 1917–present * 2nd Division (later 2nd Infantry Division): 1917–present * 3rd Division (later 3rd Infantry Division): 1917–present * 4th Division: 1917–1921; 1940–1946; 1947–present * 5th Division: 1917–1921; 1939–1946; 1947–1992 * 6th Division: 1917–1921; 1939–1949; 1986–1994 * 7th Division: 1917–1921; 1940–1971; 1974–1994; 1999–2006; 2012–present *

: 1918–1919; 1940–1945; 1950–1992 * 9th Division: 1918–1919; 1940–1947; 1947–1962; 1966–1969; 1972–1991 * 10th Division – Organized in 1918 as a Regular Army and National Army division for World War I, the 10th Division did not go overseas and demobilized in February 1919 at Camp Funston, Kansas. * 11th Division: 1918–1919 * 12th Division: 1918–1919 at

Fort Devens Fort Devens is a United States Army Reserve military installation in the towns of Ayer and Shirley, in Middlesex County and Harvard in Worcester County in the U.S. state of Massachusetts. Due to extensive environmental contamination it was li ...

, Mass. * 13th Division: 1918–1919 at Fort Lewis * 14th Division: 1918–1919 – Organized in 1918 as a Regular Army and National Army division for World War I, the 14th Division did not go overseas and demobilized in February 1919 at

Camp Custer Fort Custer Training Center, often known simply as Fort Custer, is a federally owned and state-operated Michigan Army National Guard training facility, but is also used by other branches of the armed forces and armed forces from Illinois, Indiana ...

, Michigan. * 15th Division: 1918–1919 – Organized in 1918 as a Regular Army and National Army division for World War I, the 15th Division did not go overseas and demobilized in February 1919 at Camp Logan, Texas * 16th Division: 1918–1919 – Organized in 1918 as a Regular Army and National Army division for World War I, the 16th Division did not go overseas and demobilized in March 1919 at Camp Kearny, California. * 17th Division: 1918–1919 - Organized in 1918 as a Regular Army and National Army division for World War I, the 17th Division did not go overseas. * 18th Division: 1918–1919 * 19th Division: 1918–1919 * 20th Division: 1918–1919 * 26th Division: 1917–1919; 1921–1941* (26th Infantry Division) * 27th Division: 1917–1919; 1921–1940* (27th Infantry Division) * 28th Division: 1917–1919; 1921–1941* (28th Infantry Division) * 29th Division: 1917–1919; 1921–1941* (29th Infantry Division) * 30th Division: 1917–1919; 1921–1940* (30th Infantry Division) * 31st Division: 1917–1919; 1923–1940* (31st Infantry Division) * 32nd Division: 1917–1919; 1921–1940* (32nd Infantry Division) * 33rd Division: 1917–1919; 1921–1940* (33rd Infantry Division) * 34th Division: 1917–1919; 1921–1941* (34th Infantry Division) * 35th Division: 1917–1919; 1921–1940* (35th Infantry Division) * 36th Division: 1917–1919; 1921–1940* (36th Infantry Division) * 37th Division: 1917–1919; 1921–1940* (37th Infantry Division) * 38th Division: 1917–1919; 1921–1941* (38th Infantry Division) * 39th Division: 1917–1919; 1921–1923 * 40th Division: 1917–1919; 1921–1941* (40th Infantry Division) * 41st Division: 1917–1919; 1921–1940* (41st Infantry Division) * 42nd Division: 1917–1919 * 43rd Division: 1921–1941* (43rd Infantry Division) * 44th Division: 1921–1940* (44th Infantry Division) * 45th Division: 1921–1940* (45th Infantry Division) * 76th Division: 1917–1919; 1921–1942* (76th Infantry Division) * 77th Division: 1917–1919; 1921–1942* (77th Infantry Division) * 78th Division: 1917–1919; 1921–1942* (78th Infantry Division) * 79th Division: 1917–1919; 1921–1942* (79th Infantry Division) * 80th Division: 1917–1919; 1921–1942* (80th Infantry Division) * 81st Division: 1917–1919; 1921–1942* (81st Infantry Division) * 82nd Division: 1917–1919; 1921–1942* (82nd Infantry Division) * 83rd Division: 1917–1919; 1921–1942* (83rd Infantry Division) * 84th Division: 1917–1919; 1921–1942* (84th Infantry Division) * 85th Division: 1917–1919; 1921–1942* (85th Infantry Division) * 86th Division: 1917–1919; 1921–1942* (86th Infantry Division) * 87th Division: 1917–1919; 1921–1942* (87th Infantry Division) * 88th Division: 1917–1919; 1921–1942* (88th Infantry Division) * 89th Division: 1917–1919; 1921–1942* (89th Infantry Division) * 90th Division: 1917–1919; 1921–1942* (90th Infantry Division) * 91st Division: 1917–1919; 1921–1942* (91st Infantry Division) * 92nd Division (Colored): 1917–1919 * 93rd Division (Colored): 1917–1918—provisional division * 94th Division: 1921–1942* (94th Infantry Division) A 94th Division was intended as a Spanish-speaking division recruited in Puerto Rico for World War I, but the assignment was withheld due to political wrangling. * 95th Division: 1918–1919; 1921–1942* (95th Infantry Division) * 96th Division: 1918–1919; 1921–1942* (96th Infantry Division) * 97th Division: 1918; 1921–1943* (97th Infantry Division) * 98th Division: 1918; 1921–1942* (98th Infantry Division) * 99th Division: 1918; 1921–1942* (99th Infantry Division) * 100th Division: 1918; 1921–1942* (100th Infantry Division) * 101st Division: 1918; 1921–1942* (101st Airborne Division) * 102nd Division: 1918; 1921–1942* (102nd Infantry Division) * 103rd Division: 1921–1942* (103rd Infantry Division) * 104th Division: 1921–1942* (104th Infantry Division) * USA - Hawaiian Division

Hawaiian Division The Hawaiian Division was a division of the United States Army, dedicated to the defense of Hawaii. This division was named rather than numbered, as were the Philippine, Panama Canal and Americal Divisions. It was first activated under the peacet ...

: 1921–1941* ( 24th Infantry Division; see also 25th Infantry Division) *

Panama Canal Division The Panama Canal Division was a unit of the United States Army, established in order to ensure the United States could adequately defend the Canal Zone in Panama. When it was authorized in 1920, similar divisions were organized to defend Hawaii an ...

: 1921–1932 *

Philippine Division Philippine Division, or from 1946–1947 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 enl ...

: 1921–1942 (see 12th Infantry Division)

Divisions of the United States Army (1941 to present)

Division insignia of the United States Army Shoulder sleeve insignia (SSI) are cloth emblems worn on the shoulders of US Army uniforms to identify the primary headquarters to which a soldier is assigned. The SSI of some army divisions have become known in popular culture.10th Infantry Divis ...

*Divisions in bold are currently active.*

Air assault divisions

11th Air Assault Division (Test) (formerly 11th Airborne Division): 1963–1965

Airborne divisions

6th Airborne Division The 6th Airborne Division was an airborne infantry division of the British Army during the Second World War. Despite its name, the 6th was actually the second of two airborne divisions raised by the British Army during the war, the other being t ...

: phantom World War II division * 9th Airborne Division: phantom World War II division *

11th Airborne Division The 11th Airborne Division ("Arctic Angels") is a United States Army airborne formation, first activated on 25 February 1943, during World War II. Consisting of one parachute and two glider infantry regiments, with supporting troops, the div ...

: 1943–1958; 2022–present * USA - 13 ABN DIV

13th Airborne Division: 1943–1946 * 15th Airborne Division: not actually organized during World War II * USA - 17 ABN DIV

17th Airborne Division: 1943–1945; 1948–1949 * 18th Airborne Division: phantom World War II division * 21st Airborne Division: phantom World War II division *

80th Airborne Division 8 (eight) is the natural number following 7 and preceding 9. In mathematics 8 is: * a composite number, its proper divisors being , , and . It is twice 4 or four times 2. * a power of two, being 2 (two cubed), and is the first number of t ...

: 1946–1952* (80th Infantry Division) * 82nd Airborne Division CSIB

82nd Airborne Division The 82nd Airborne Division is an Airborne forces, airborne infantry division (military), division of the United States Army specializing in Paratrooper, parachute assault operations into denied areasSof, Eric"82nd Airborne Division" ''Spec Ops ...

: 1942–present * 84th Airborne Division: 1946–1952* (84th Infantry Division) * 100th Airborne Division: 1946–1952* (100th Infantry Division) * Combat service identification badge of the 101st Airborne Division

101st Airborne Division The 101st Airborne Division (Air Assault) ("Screaming Eagles") is a light infantry division of the United States Army that specializes in air assault operations. It can plan, coordinate, and execute multiple battalion-size air assault operati ...

: 1942–1945; 1948–1949; 1950–1953; 1954–present * 108th Airborne Division: 1946–1952* (108th Infantry Division) * 135th Airborne Division: phantom World War II division

Armored divisions

United States Army 1st Armored Division CSIB

1st Armored Division: 1940–1946; 1951–1957; 1962–present. The 1st Armored Division's Combat Command A remained on active duty between 1957 and 1962. * United States Army 2nd Armored Division CSIB

United States Army 2nd Armored Division CSIB

2nd Armored Division: 1940–1995 * 3rd US Armored Division SSI

3rd Armored Division: 1941–1945; 1947–1992 * 4th US Armored Division SSI

4th Armored Division: 1941–1946; 1954–1971. The 4th Armored Division was effectively organized as the

United States Constabulary The United States Constabulary was a United States Army military gendarmerie force. From 1946 to 1952, in the aftermath of World War II, it acted as an occupation and security force in the U.S. Occupation Zone of West Germany and Austria. Reaso ...

from 1946 to 1954. * 5th US Armored Division SSI

5th Armored Division: 1941–1945; 1950–1956 * 6th US Armored Division SSI

6th Armored Division The 6th Armored Division ("Super Sixth") was an armored division of the United States Army during World War II. It was formed with a cadre from the 2nd Armored Division. History The division was activated on 15 February 1942 at Fort Knox o ...

: 1942–1945; 1950–1956 * 7th US Armored Division SSI

7th Armored Division: 1942–1945; 1950–1953 * 8th US Armored Division SSI

8th Armored Division: 1942–1945 * 9th US Armored Division SSI

9th Armored Division: 1942–1945 * 10th US Armored Division SSI

10th Armored Division: 1942–1945 * 11th US Armored Division SSI

11th Armored Division: 1942–1945 * 12th U

12th Armored Division The 12th Armored Division was an armored division of the United States Army in World War II. It fought in the European Theater of Operations in France, Germany and Austria, between November 1944 and May 1945. The German Army called the 12th A ...

: 1942–1945 * 13th US Armored Division SSI

13th Armored Division: 1942–1945; 1947–1952 * 14th US Armored Division SSI

14th Armored Division: 1942–1945 * 15th Armored Division: phantom World War II division * 16th US Armored Division SSI

16th Armored Division: 1943–1945 * 18th Armored Division: never actually organized during World War II * 19th Armored Division: unorganized World War II division * 20th US Armored Division SSI

20th Armored Division: 1943–1946 * 21st Armored Division: unorganized World War II division * 22nd Armored Division: unorganized World War II division * 25th Armored Division: phantom World War II division created as part of

Operation Fortitude Operation Fortitude was the code name for a World War II military deception employed by the Allied nations as part of an overall deception strategy (code named ''Bodyguard'') during the build-up to the 1944 Normandy landings. Fortitude was di ...

27th Armored Division: 1954–1967 * 30th US Armored Division SSI

30th Armored Division The 30th Armored Division was a Tennessee-based unit of the Army National Guard from the 1950s to the 1970s. Activation and service In 1954 the 30th Infantry Division was reorganized, with units in North Carolina and South Carolina constitutin ...

: 1954–1973. The 30th Armored Division was organized as the result of an agreement between Tennessee and North Carolina to split the 30th Infantry Division. * 39th Armored Division: phantom World War II division * 40th Armored Division: 1954–1967 * 48th US Armored Division SSI

48th Armored Division The 48th Armored Division was a division (military), division of the United States Army National Guard from September 1946 until 1968. Most of its units were part of the Florida Army National Guard and the Georgia Army National Guard. From 1946 ...

: 1954–1968 * 49th US Armored Division SSI

49th Armored Division The 49th Armored Division —nicknamed the "Lone Star"— was an armored division of the Texas Army National Guard during the Cold War. Active from 1947, the division formed part of the Texas Army National Guard together with the 36th Infantr ...

: 1946–1967; 1973–2004 * 50th US Armored Division SSI

50th Armored Division The 50th Armored Division was a division of the Army National Guard from July 1946 until 1993. History On 13 October 1945 the War Department published a postwar policy statement for the entire Army, calling for a 27-division Army National Guard ...

: 1946–1993

Cavalry divisions

1st Cavalry Division: 1921–present * US 2nd Cavalry Division

2nd Cavalry Division: 1941–1942; 1943–1944

Infantry divisions

1st Infantry Division: 1917–present * 2nd Infantry Division SSI (full color)

2nd Infantry Division: 1917–present * United States Army 3rd Infantry Division SSI (1918-2015)

3rd Infantry Division: 1917–present * 4th Infantry Division SSI (1918-2015)

4th Infantry Division: 1940–1942* (4th Motorized Division); 1943–1946; 1947–present * US 5th Infantry Division

5th Infantry Division: 1939–1950; 1951–1953; 1954–1957; 1962–1992 *

6th Infantry Division 6th Division may refer to: Infantry divisions * 6th Division (Australia) * 6th Division (Austria) *6th (United Kingdom) Division * Finnish 6th Division (Winter War) *Finnish 6th Division (Continuation War) * 6th Division (Reichswehr) * 6th Divisi ...

: 1939–1942* (6th Motorized Division); 1943–1949; 1950–1956; 1967–1968; 1984–1998. The 6th Infantry Division itself was deactivated in 1994, but the 1st Brigade, 6th Infantry Division remained in the active force under that designation until being reflagged as the 172nd Infantry Brigade in 1998. * 7th Infantry Division CSIB

7th Infantry Division: 1940–1942* (7th Motorized Division); 1943–1971; 1974–1994; 1999–2006; 2012–Present * 8th Infantry Division patch

8th Infantry Division: 1940–1942* (8th Motorized Division); 1943–1945; 1950–1992 * 9th Infantry Division patch

9th Infantry Division: 1940–1962; 1966–1969; 1972–1991. The Division experienced a brief period of inactivation in 1947. * 10th Mountain Division CSIB

10th Infantry Division (10th Mountain Division): 1943–1945; 1948–1958; 1985-present * US 11th Infantry Division

11th Infantry Division: phantom World War II division * 12th Infantry Division SSI

12th Infantry Division: (formerly Philippine Division): 1921–1942; 1946–1947 * 14th Infantry Division: phantom World War II division * 15th Infantry Division: phantom World War II division * 16th Infantry Division: phantom World War II division * 17th Infantry Division: phantom World War II division * 19th Infantry Division: phantom World War II division * 21st Infantry Division: phantom World War II division * 22nd Infantry Division: phantom World War II division * Americal patch

23rd Infantry Division (Americal Division 1942–1945): 1954–1956; 1967–1971 * 24 Infantry Division SSI

24th Infantry Division (formerly Hawaiian Division): 1941–1970; 1975–1996; 1999–2006 * 25th Infantry Division CSIB

25th Infantry Division: 1941–present * Yankee Division

26th Infantry Division: 1941–1945; 1946–1993 * 27th Infantry Division SSI

27th Infantry Division: 1940–1945; 1946–1954* (27th Armored Division) * 28th Infantry Division SSI (1918-2015)

28th Infantry Division: 1941–1945; 1946–present * 29th Infantry Division SSI

29th Infantry Division: 1941–1946; 1946–1967; 1985–present * 30th Infantry Division SSI

30th Infantry Division: 1940–1945; 1946–1973 * 31st ID SSI

31st Infantry Division: 1940–1945; 1946–1967 * 32nd infantry division shoulder patch

32nd Infantry Division: 1940–1946; 1946–1967 * 33rd Infantry Division SSI

33rd Infantry Division: 1940–1946; 1946–1967 * 34th 'Red Bull' Infantry Division SSI

34th Infantry Division: 1941–1945; 1946–1963; 1991–present * 35th Infantry Division SSI

35th Infantry Division: 1940–1945; 1946–1963; 1984–present * 36th Infantry Division CSIB

36th Infantry Division: 1940–1945; 1946–1967; 2004–present * 37th Infantry Division CSIB

37th Infantry Division: 1940–1945; 1946–1967 * 38th Infantry Division SSI

38th Infantry Division: 1941–1945; 1946–present * US 39th Infantry Division

39th Infantry Division: 1946–1967 * 40th Infantry Division CSIB

40th Infantry Division: 1941–1946; 1946–1954* (40th Armored Division); 1973–present * 41st Infantry Division SSI

41st Infantry Division: 1940–1945; 1946–1967 * 42nd Infantry Division SSI

42nd Infantry Division: 1943–1945; 1947–present * 43rd Infantry Division CSIB

43rd Infantry Division: 1941–1945; 1946–1963 * 44 INF DIV SSI

44th Infantry Division: 1940–1945; 1946–1954 * 45thIBCTSSI

45th Infantry Division: 1940–1945; 1946–1967 * 46th Infantry Division CSIB

46th Infantry Division: 1946–1967 * 47th Division Shoulder Patch

47th Infantry Division: 1946–1991 * 48th Infantry Division: 1946–1954* (48th Armored Division) * 49th ID SSI

49th Infantry Division: 1947–1967 (former 52nd Infantry Division) * 50th Infantry Division: phantom World War II division * 51 INF DIV SSI

51st Infantry Division: 1946–1963 * 52nd Infantry Division: 1946–1947 (renamed 49th Infantry Division) * 55th Infantry Division: phantom World War II division * 59th Infantry Division: phantom World War II division * 61st Infantry Division: never actually organized during World War II * 62nd Infantry Division: never actually organized during World War II * 63rd Infantry Division SSI

63rd Infantry Division: 1943–1945; 1952–1965 * 65th Infantry Division SVG

65th Infantry Division: 1943–1945 * 66th Infantry Division shoulder sleeve insignia

66th Infantry Division: 1943–1945 * 67th Infantry Division: never actually organized during World War II * 68th Infantry Division: never actually organized during World War II * US 69th Infantry Division

69th Infantry Division: 1943–1945; 1954–1956 * 70th Infantry Division patch

70th Infantry Division: 1943–1945; 1952–1955* (70th Division) * US 71st Infantry Division

71st Infantry Division: 1944–1946; 1954–1956 * 72nd Infantry Division: never actually organized during World War II * 73rd Infantry Division: unorganized World War II division * 74th Infantry Division: unorganized World War II division * 75e Division d'Infanterie (USA)

75th Infantry Division: 1943–1945; 1952–1957 * 76 Inf Div SSI

76th Infantry Division: 1942–1945; 1946–1955* (76th Division) *

77th Infantry Division 77th Division or 75th Infantry Division may refer to: *77th Infantry Division (Wehrmacht), Germany *77th Infantry Division of Khurasan, Iran *77th Division (Imperial Japanese Army) *77th Division (People's Republic of China) *77th Division (Spain ...

: 1942–1946; 1946–1965 * 78th Infantry Division SSI

78th Infantry Division: 1942–1946; 1946–1955* (78th Division) * 79th Infantry Division SSI

79th Infantry Division: 1942–1945; 1946–1963 * 80th Inf Div SSI SVG

80th Infantry Division: 1942–1946* (80th Airborne Division); 1952–1955* (80th Division) * US Army 81st Infantry Division SSI

81st Infantry Division: 1942–1946; 1946–1965 * 82nd Airborne Division CSIB

82nd Infantry Division The 82nd Airborne Division is an Airborne forces, airborne infantry division (military), division of the United States Army specializing in Paratrooper, parachute assault operations into denied areasSof, Eric"82nd Airborne Division" ''Spec Ops ...

: 1942* (82nd Airborne Division) * 83rd Infantry Division SSI

83rd Infantry Division: 1942–1946; 1946–1965 * US 84th Infantry Division

84th Infantry Division: 1942–1946* (84th Airborne Division); 1952–1955* (84th Division) * 85th Division SSI

85th Infantry Division: 1942–1955* (85th Division) * 86 Inf Div SSI

86th Infantry Division: 1942–1946 * US 87th Infantry Division

87th Infantry Division: 1942–1945; 1946–1957 * 88th Infantry Division SSI

88th Infantry Division: 1942–1947 * 89th Regional Readiness Command SSI

89th Infantry Division: 1942–1943* (89th Light Division); 1944–1945; 1946–1955* (89th Division) *

90th Infantry Division 90th Division may refer to: ;Infantry * 90th Division (1st Formation)(People's Republic of China), 1949–1950 * 90th Division (2nd Formation)(People's Republic of China), 1950–1952 * 90th Light Infantry Division (Wehrmacht) * 90th Infantry Divi ...

: 1942–1945; 1946–1965 * US 91st Infantry Division

91st Infantry Division: 1942–1945; 1946–1955* (91st Division) * US 92nd Infantry Division SVG

92nd Infantry Division (Colored): 1942–1945 * US 93rd Infantry Division

93rd Infantry Division (Colored): 1942–1946. Although the 93rd Infantry Division shares the same number designation and patch as the previous 93rd Division, the two divisions are otherwise unrelated and do not share lineal ties. * 94th Regional Readiness Command SSI

94th Infantry Division In military terms, 94th Division or 94th Infantry Division may refer to: * 94th Division (People's Republic of China) * 94th Infantry Division (German Empire) * 94th Infantry Division (Wehrmacht) * 94th Division (Imperial Japanese Army) * 94th Gu ...

: 1942–1946; 1946–1963 * 95TrainingDivSSI SVG

95th Infantry Division: 1942–1945; 1946–1955* (95th Division) * 96th Infantry Division SSI

96th Infantry Division: 1942–1946; 1946–1963 * 97THID

97th Infantry Division: 1943–1946 * 98th Infantry Division shoulder sleeve insignia

98th Infantry Division: 1942–1946; 1946–1955* (98th Division) * US 99th Infantry Division

99th Infantry Division The 99th Infantry Division was formed in 1942 and deployed overseas in 1944. The "Checkerboard" or "Battle Babies" division landed at the French port of Le Havre and proceeded northeast to Belgium. During the heavy fighting in the Battle of the ...

: 1942–1945 * 100th Infantry Division SSI

100th Infantry Division: 1942–1946* (100th Airborne Division); 1952–1955* (100th Division) * 102 INF DIV SSI

102nd Infantry Division: 1942–1946; 1946–1965 * US 103rd Infantry Division

103rd Infantry Division: 1942–1945; 1946–1963 * 104TrngDivLdrTrngSSI

104th Infantry Division: 1942–1945; 1946–1959* (104th Division) * 105th Infantry Division: never actually organized during World War II * 106Infantry Division

106th Infantry Division: 1943–1945; 1946–1950. The 106th Infantry Division was never officially added to the troop list following World War II, despite having been almost completely organized in Puerto Rico by 1948; subsequently, the War Department determined the division was not needed and deactivated the division headquarters in 1950. * 107th Infantry Division: never actually organized during World War II * 108th Infantry Division: phantom World War II division * 108th Infantry Division: 1952–1955* (108th Division) * 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 The 105th and 107th Infantry Divisions were intended to be negro divisions of the Army of the United States; however, due to a shortage of available manpower, their activations were canceled in 1942.

Light divisions

* 10th Light Division (Alpine): 1943–1944* (10th Mountain Division) * 71st Light Division (Pack): 1943–1944* (71st Infantry Division) * 89th Light Division (Truck): 1943–1944* (89th Infantry Division)

Motorized divisions

* 4th Motorized Division: 1942–1943* (4th Infantry Division) * 5th Motorized Division: phantom World War II division * 6th Motorized Division: 1942–1943* (6th Infantry Division) * 7th Motorized Division: 1942–1943* (7th Infantry Division) * 8th Motorized Division: 1942–1943* (8th Infantry Division) * 90th Motorized Division: 1942–1943* (90th Infantry Division)

Mountain divisions

10th Mountain Division The 10th Mountain Division (Light Infantry) is a light infantry division in the United States Army based at Fort Drum, New York. Formerly designated as a mountain warfare unit, the division was the only one of its size in the US military to re ...

: 1944–1945; 1985–present

Reserve training divisions

In an attempt to maintain its divisions, the Army Reserve transformed several of its combat divisions into training divisions; these divisions were still designated as infantry divisions until authorized as "divisions (training)" by the adjutant general in 1959. * 69th Division: 1954–1956 * 70th Division: 1955–1996 * 75th Division: 1993–2008 * 76th Division: 1955–1996 * 78th Division: 1955–2008 * 80th Division: 1955–2008 * 84th Division: 1955–2004 * 85th Division: 1955–2008 * 87th Division: 1993–2008 * 89th Division: 1955–1975 * 91st Division: 1955–2008, 2010–present * 95TrainingDivSSI SVG

95th Division: 1955–present * 98th Division: 1955–2008 * 100th Infantry Division SSI

100th Division: 1955–present * 104th Division: 1959–2008 * 108th Division: 1955–2008 * First Army Division East: 2006–present * First Army Division West: 2006–present

Divisions planned but never actually formed during World War II

At the time of the Japanese attacks on

Pearl Harbor Pearl Harbor is an American lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. It was often visited by the Naval fleet of the United States, before it was acquired from the Hawaiian Kingdom by the U.S. with the signing of the Re ...

Wake Island Wake Island ( mh, Ānen Kio, translation=island of the kio flower; also known as Wake Atoll) is a coral atoll in the western Pacific Ocean in the northeastern area of the Micronesia subregion, east of Guam, west of Honolulu, southeast of To ...

, and

the Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

, the United States Army was composed of 37 divisions, including the

. Initially, necessary mobilization was estimated to be as high as 350 divisions, but the Army ultimately settled on a 100-division plan. This relatively low number (compared to the high estimates) was partially due to the army's policy of assigning many combat units, particularly

artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during siege ...

and

tank destroyer A tank destroyer, tank hunter, tank killer, or self-propelled anti-tank gun is a type of armoured fighting vehicle, armed with a direct fire artillery gun or missile launcher, designed specifically to engage and destroy enemy tanks, often wi ...

units, directly to

corps Corps (; plural ''corps'' ; from French , from the Latin "body") is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was first named as such in 1805. The size of a corps varies great ...

and higher-level commands. These non-divisional units numbered approximately 1.5 million soldiers, enough personnel to man roughly 100 more divisions. The strategic philosophy was that such units could be assigned to divisions on an as-needed basis, and would allow divisions to remain as mobile and flexible as possible. By the end of 1943, U.S. Army strength stood at more than 70 divisions.

Allied An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out among them. Members of an alliance are called ...

gains in 1942 and 1943 resulted in a further contraction of U.S. mobilization, and the last wartime division, the 65th Infantry Division, was activated on 16 August 1943. In all, 91 divisions served in the U.S. Army in

. When the decision was made to halt the increase in divisions, 12 more divisions were still on the rolls, but would not be organized, though several of these would be organized following the war. They were the 15th Airborne Division, the 18th, 21st and 22nd Armored Divisions, the 19th Armored Division, which was in fact activated following the war, the 61st, 62nd, 67th, 68th, 72nd, 73rd, and 74th Infantry Divisions, and the 105th and 107th Infantry Divisions, which were intended to be Negro formations. Unique among the 14 unorganized divisions, the 15th Airborne Division was not only a victim of the decision to set the size of the Army at 89 divisions (the 2nd Cavalry Division had been deactivated during the war and the Philippine Division was destroyed as a result of the Japanese victory in the Philippines), but also because it had become evident that the

Army Air Forces The United States Army Air Forces (USAAF or AAF) was the major land-based aerial warfare service component of the United States Army and ''de facto'' aerial warfare service branch of the United States during and immediately after World War II ...

lacked enough

transport aircraft Transport aircraft is a broad category of aircraft that includes: * Airliners, aircraft, usually large and most often operated by airlines, intended for carrying multiple passengers or cargo in commercial service * Cargo aircraft or freighters, fix ...

to support a sixth

airborne Airborne or Airborn may refer to: Arts, entertainment, and media Films * ''Airborne'' (1962 film), a 1962 American film directed by James Landis * ''Airborne'' (1993 film), a comedy–drama film * ''Airborne'' (1998 film), an action film sta ...

division. The 13th Airborne Division never saw combat for this very reason. The 105th and 107th Infantry Divisions were to join the 92nd and 93rd Infantry Divisions as

Negro In the English language, ''negro'' is a term historically used to denote persons considered to be of Black African heritage. The word ''negro'' means the color black in both Spanish and in Portuguese, where English took it from. The term can be ...

divisions. A shortage of manpower resulted in the activation of the 105th and 107th being canceled in 1942.

Notes

References

* Bellanger, Yves J. (2002). ''US Army Infantry Divisions, 1943–1945, Volume 1: Organisation, Doctrine and Equipment''. Solihull: Helion. * Holt, Thaddeus (2004). ''The Deceivers: Allied Military Deception in the Second World War''. New York: Simon & Schuster. * Muschett, James O. (ed.) (2001). ''The Army''. Westport: Hugh Lauter Levin. * Stanton, Shelby L. (2006). ''World War II Order of Battle: An Encyclopedic Reference to U.S. Army Ground Forces from Battalion through Division, 1939–1946 (Revised Edition)''. Mechanicsburg: Stackpole. * Stewart, Richard W. (ed.) (2005). ''American Military History, Volume II: The United States Army in a Global Era, 1917–2003''. Washington, D.C.: Government Printing Office. * Tolson, John J. (1989). ''Airmobility 1961–1971''. Washington, D.C.: Government Printing Office. * Wilson, John B. (1987). ''Armies, Corps, Divisions, and Separate Brigades''. Washington, D.C.: Government Printing Office. * {{Cite book, last=Wilson, first=John B., year=1998, url=http://www.history.army.mil/books/Lineage/M-F/index.htm, archive-url=https://web.archive.org/web/20121226124441/http://www.history.army.mil/books/Lineage/M-F/index.htm, url-status=dead, archive-date=2012-12-26, title=Maneuver and Firepower: The Evolution of Divisions and Separate Brigades, location=Washington, D.C., publisher= Center of Military History, U.S. Army, OCLC=30625000, LCCN=94021031.

History

American Revolution

American Civil War

Designations

Divisions of the United States Army (1911–17)

National Defense Act of 1916

Divisions of the United States Army (1917 to 1941)

Cavalry divisions

Infantry divisions

Divisions of the United States Army (1941 to present)

Division insignia of the United States Army Shoulder sleeve insignia (SSI) are cloth emblems worn on the shoulders of US Army uniforms to identify the primary headquarters to which a soldier is assigned. The SSI of some army divisions have become known in popular culture.10th Infantry Divis ...

Air assault divisions

Airborne divisions

Armored divisions

Cavalry divisions

Infantry divisions

Light divisions

Motorized divisions

Mountain divisions

Reserve training divisions

Divisions planned but never actually formed during World War II

See also

Notes

References

Further reading