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

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...

list of historical formations of the United States Army. Units still in existence are in bold. For specific eras: Formations of the United States Army during...

Many Army divisions have over the years earned nicknames; some laudatory, some derogatory, but mostly colorful. Sometimes, the nicknames themselves have...

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

The history of the United States Army began in 1775, as part of the United States Armed Forces. The Army's main responsibility has been in fighting land...

The 2nd Infantry Division (2ID, 2nd ID) ("Indianhead") is a formation of the United States Army. Since the 1960s, its current primary mission is the pre-emptive...

The 1st Infantry Division (1ID) is a combined arms division of the United States Army, and is the oldest continuously serving division in the Regular...

The following is a list of United States Army and United States Marine Corps divisions of World War II. The United States began the war with only a handful...

The United States of America is a federal republic consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States)...

The 24th Infantry Division was an infantry division of the United States Army that was inactivated in October 1996. Formed during World War II from the...

The 25th Infantry Division (nicknamed "Tropic Lightning") is a United States Army division based at Schofield Barracks in Hawaii. The division, which was...

The 3rd Infantry Division (3ID) (nicknamed Rock of the Marne) is a combined arms division of the United States Army based at Fort Stewart, Georgia. It...

The 42nd Infantry Division (42ID) ("Rainbow") is a division of the United States Army National Guard. It was nicknamed the Rainbow Division because, during...

The United States Department of the Army (DA) is one of the three military departments within the Department of Defense of the U.S. The Department of...

First Army is the oldest and longest-established field army of the United States Army. It served as a theater army, having seen service in both World War...

The 80th Training Command (The Army School System - TASS) is a formation of the United States Army Reserve. The unit was first organized in August 1917...

The Seventh Army was a United States army created during World War II that evolved into the United States Army Europe (USAREUR) during the 1950s and 1960s...

The 28th Infantry Division ("Keystone") is a unit of the United States Army National Guard, and is the oldest division-sized unit in the Army. Some of...

The 84th Training Command ("Railsplitters") is a formation of the United States Army. During World War I it was designated the 84th Division, American...

The United States Cavalry, or U.S. Cavalry, was the designation of the mounted force of the United States Army. The United States Cavalry was formally...

Philippine Division, or from 1944–1947 the 12th Infantry Division, was the core U.S. infantry division of the United States Army's Philippine Department...

The 5th Infantry Division (Mechanized)—nicknamed the "Red Diamond", or the "Red Devils" —was an infantry division of the United States Army that served...

The 1st Cavalry Division ("First Team") is a combined arms division and is one of the most decorated combat divisions of the United States Army. It is...

The 3rd Armored Division (also known as "Spearhead", 3rd Armored, and 3AD) was an armored division of the United States Army. Unofficially nicknamed the...

The 13th Airborne Division was an airborne forces formation of division-size of the United States Army that was active during World War II. The division...

The 2nd Armored Division ("Hell on Wheels") was an armored division of the United States Army. The division played important roles during World War II...

The 34th Infantry Division is an infantry division of the United States Army, part of the National Guard, that participated in World War I, World War...

The Department of the Army Criminal Investigation Division (CID), previously known as the United States Army Criminal Investigation Command (USACIDC) is...