The Army of Central Kentucky (Confederate) was organized in fall 1861 under the command of Brig. Gen. Simon B. Buckner and served in the Western Theater. It was later commanded by Gen. Albert Sidney Johnston and temporarily by Lt. Gen. William J. Hardee. It was merged into the Army of Mississippi on March 29, 1862, and reorganized as the Army of Tennessee on November 20, 1862. (Wiki)
The Army of Mississippi (also known as the Army of the West) was organized on March 5, 1862 under the command of Gen. P. G. T. Beauregard and served in the Western Theater. On March 13, 1862 units of the Army of Pensacola were added to it, and it was consolidated with the Army of Central Kentucky and the Army of Louisiana on March 29, 1862. It was later commanded by Gen. Albert Sidney Johnston, Gen. Braxton Bragg, Maj. Gen. William J. Hardee, and Lt. Gen. Leonidas Polk. It was renamed the Army of Tennessee on November 20, 1862. (Wiki)
The Army of Northern Virginia (Confederate) was organized on June 20, 1861 as the Confederate Army of the Potomac under the command of P. G. T. Beauregard and served in the Eastern Theater. It was later commanded by Gen. Joseph E. Johnston (July 20, 1861‚ÄìMay 31, 1862) and then renamed the Army of Northern Virginia on March 14, 1862 and commanded by Gen. Robert E. Lee from June 1, 1862–April 12, 1865. (VAE; Wiki)
The Army of Tennessee (Confederate) was organized in spring 1861 as the Provisional Army of Tennessee under the command of Gen. Albert Sidney Johnston and served in the Western Theater. It was renamed the Army of Tennessee in November 1862 and was later commanded by Gen. P. G. T. Beauregard, Maj. Gen. Braxton Bragg, Gen. Joseph E. Johnston, and Gen. John Bell Hood. (Brit; TNE; Wiki)
The Army of the West (Confederate), also known as the Trans-Mississippi District, was organized in spring 1862 under the command of Maj. Gen. Earl Van Dorn and served in the Western and Trans-Mississippi Theaters. It was later commanded by Maj. Gens. John P. McCown and Sterling Price. (Wiki)
The Army of Georgia (Union) was organized in November 1864 from the XIV and XX Corps of the Army of the Cumberland under the command of Maj. Gen. Henry Warner Slocum. It formed the left wing of Maj. Gen. Sherman’s March to the Sea. (Wiki)
The Army of the Cumberland (Union) was organized from the Army of the Ohio and the Department of the Cumberland on October 24, 1862 under the command of Maj. Gen. William S. Rosecrans and served in the Western Theater. It was later commanded by Maj. Gen. George H. Thomas from October 19, 1863 to August 1, 1865. (TNE; Wiki)
The Army of the Ohio (Union) was organized in November 1861 under the command of Brig. Gen. Don Carlos Buell and served in the Western Theater. It was re-designated as the Army of the Cumberland in October 1862 under the command of Maj. Gen. William S. Rosecrans, and in spring 1863 a second Army of the Ohio was organized under the command of Maj. Gen. Ambrose Burnside. (Wiki)
The Army of the Potomac (Union) was organized on July 26, 1861 under the command of Maj. Gen. George B. McClellan and served in the Eastern Theater. It was later commanded by Maj. Gens. Ambrose Burnside, Joseph Hooker, and George Meade. (Wiki)
The Army of the Tennessee (Union), also known as the Army of West Tennessee, was organized between 1861–1862 by Brig. Gen. Ulysses S. Grant and served in the Western Theater. It was later commanded by Maj. Gens. William T. Sherman, James B. McPherson, John A. Logan, and Oliver O. Howard. (Wiki)
