1861–1865 - Civil War

Lewis Addison Armistead was a Confederate general during the American Civil War. He was mortally wounded during Pickett's Charge at the Battle of Gettysburg.

APUSH Definition — Lewis Armistead (1817–1863) was an officer in the Confederate Army during the Civil War. He was mortally wounded during Pickett's Charge at the Battle of Gettysburg.

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 Confederate Army of Kentucky (CSA) was organized by Major General Kirby Smith and incorporated soldiers from the Department of East Tennessee. The short-lived Army of Kentucky participated in the Confederate Heartland Campaign of 1862.

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 Missouri was a 12,000-man Confederate force commanded by Major General Sterling Price during a failed expedition into Missouri in the autumn of 1864.

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.

Organized in 1861, and officially named in 1862, the Army of Northern Virginia was the principal military force of the Confederate States of America in the Eastern Theater of the American Civil War.

The Army of Tennessee was the Confederacy's primary fighting force in the Western Theater of the American Civil War between 1862 and 1865.

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.

Officially organized on March 5, 1862, the Army of the Mississippi transitioned into the Army of Tennessee, the Confederacy's preeminent fighting force in the Western Theater of the American Civil War.

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.

Created on June 8, 1861, from troops in western Virginia, the Confederate Army of the Northwest participated in the Battle of Rich Mountain, the Battle of Cheat Mountain, and the Romney Expedition before being dissolved on February 9, 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.