Civil War - Armies - Union

The 1st Kansas Colored Volunteer Infantry Regiment was organized in 1862 as a state unit. It was reorganized as the 79th U.S. Colored Infantry Regiment and was the first black regiment to be organized in a northern state and the first to see combat during the Civil War.

The 54th Massachusetts Colored Infantry Regiment was one of the first African-American units to serve in the Union's Volunteer Army during the Civil War.

The Army of Georgia (USA) was a Union Army during the Civil War. It is most well-known for participating in Sherman's March to the Sea and the Carolinas Campaign.

The Army of Kentucky (USA) was a Union Army during the Civil War. It is most well-known for participating in battles in the state of Tennessee.

The Army of Northeastern Virginia was the unofficial name of the Union's primary fighting force in the Eastern Theater of the American Civil War prior to the formation of the Army of the Potomac.

Union Major General Samuel Curtis organized the Army of the Border to confront Confederate Major General Sterling Price's Army of Missouri as it marauded through Missouri during October 1864.

During the American Civil War, the Union Army of the Cumberland participated in nearly all of the major campaigns in the Western Theater.

Formed from forces in the field from Missouri and Kansas the short-lived Army of the Frontier fought to maintain Union control of Missouri during 1862 and 1863.

An amalgamation of troops assigned to the Department of the Gulf from 1862 through 1865, the Army of the Gulf served as an occupation force in New Orleans (1862-1863) and as the main Union command during the Red River Campaign during the American Civil War.

During the American Civil War, Lieutenant General Ulysses S. Grant consolidated troops from the Department of Virginia and North Carolina to form the Army of the James to support his Overland Campaign in 1864.

Created on February 23, 1862, the Army of the Mississippi participated in the Battle of Island No. 10, the Siege of Corinth, the Battle of Iuka, and the Battle of Corinth II, before being discontinued on October 26, 1862.

Unofficially organized and discontinued in January 1863, the second Army of the Mississippi easily overran Brigadier-General Thomas J. Churchill's Confederate garrison at Fort Hindman during the Battle of Arkansas Post (January 9-11, 1863).

The Army of the Mountain Department was the unofficial designation for a force of roughly 25,000 Union soldiers commanded by Major General John C. Frémont during the Shenandoah Valley Campaign of 1862.

During the American Civil War, there were two Union armies designated as the Army of the Ohio. The first Army of the Ohio existed during the years 1861 and 1862.

During the American Civil War, there were two Union armies designated as the Army of the Ohio. The second Army of the Ohio existed during the years 1863 to 1865.

The Army of the Potomac was the Union's primary fighting force in the Eastern Theater throughout most of the American Civil War.

The first Army of the Shenandoah is an unofficial designation given to troops who served in the Shenandoah Valley in 1861 and 1862 during the American Civil War.

First commanded by Major General Philip Sheridan, the Second Army of the Shenandoah was formed in August 1864 to drive Confederate General Jubal Early's forces out of Shenandoah Valley.

The Army of the Southwest was a short-lived Union force organized on December 25, 1861, to resist Confederate forces operating in Missouri.

Composed primarily of Midwesterners, the Union Army of the Tennessee participated in nearly all of the major campaigns in the Western Theater during the American Civil War from 1861 through 1865.