There were three organizations known as the Army of Mississippi in the Confederate States Army

Confederate States Army

The Confederate States Army was the army of the Confederate States of America while the Confederacy existed during the American Civil War. On February 8, 1861, delegates from the seven Deep South states which had already declared their secession from the United States of America adopted the...

 during the American Civil War

American Civil War

The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

. (This name is contrasted against Army of the Mississippi

Army of the Mississippi

Army of the Mississippi was the name given to two Union armies that operated around the Mississippi River, both with short existences, during the American Civil War.-1862:...

, which was a Union Army

Union Army

The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army...

 named for the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

, not the state of Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

.)

Army of Mississippi (March 1862)

This army, at times known by the names Army of the West or Army of the Mississippi (the latter particularly at Shiloh

Battle of Shiloh

The Battle of Shiloh, also known as the Battle of Pittsburg Landing, was a major battle in the Western Theater of the American Civil War, fought April 6–7, 1862, in southwestern Tennessee. A Union army under Maj. Gen. Ulysses S. Grant had moved via the Tennessee River deep into Tennessee and...

), was one of the most important in the Western theater, with battles from Shiloh to Perryville

Battle of Perryville

The Battle of Perryville, also known as the Battle of Chaplin Hills, was fought on October 8, 1862, in the Chaplin Hills west of Perryville, Kentucky, as the culmination of the Confederate Heartland Offensive during the American Civil War. Confederate Gen. Braxton Bragg's Army of Mississippi won a...

. It was organized on March 5, 1862, and portions of the Army of Pensacola were added on March 13. It was consolidated with the Army of Central Kentucky and the Army of Louisiana on March 29. On November 20, 1862, it was renamed the Army of Tennessee

Army of Tennessee

The Army of Tennessee was the principal Confederate army operating between the Appalachian Mountains and the Mississippi River during the American Civil War. It was formed in late 1862 and fought until the end of the war in 1865, participating in most of the significant battles in the Western Theater...

.

Command History

Commander	From	To	Major Battles and Campaigns
Gen. P.G.T. Beauregard	March 5, 1862 (assumed March 17, 1862)	March 29, 1862
Gen. Albert Sidney Johnston Albert Sidney Johnston Albert Sidney Johnston served as a general in three different armies: the Texas Army, the United States Army, and the Confederate States Army...	March 29, 1862	April 6, 1862	Shiloh Battle of Shiloh The Battle of Shiloh, also known as the Battle of Pittsburg Landing, was a major battle in the Western Theater of the American Civil War, fought April 6–7, 1862, in southwestern Tennessee. A Union army under Maj. Gen. Ulysses S. Grant had moved via the Tennessee River deep into Tennessee and...
Gen. P.G.T. Beauregard	April 6, 1862	May 6, 1862
Gen. Braxton Bragg Braxton Bragg Braxton Bragg was a career United States Army officer, and then a general in the Confederate States Army—a principal commander in the Western Theater of the American Civil War and later the military adviser to Confederate President Jefferson Davis.Bragg, a native of North Carolina, was...	May 6, 1862 (assumed May 7, 1862)	July 5, 1862
Maj. Gen. William J. Hardee William J. Hardee William Joseph Hardee was a career U.S. Army officer, serving during the Second Seminole War and fighting in the Mexican-American War...  (temp)	July 5, 1862	August 15, 1862
Gen. Braxton Bragg Braxton Bragg Braxton Bragg was a career United States Army officer, and then a general in the Confederate States Army—a principal commander in the Western Theater of the American Civil War and later the military adviser to Confederate President Jefferson Davis.Bragg, a native of North Carolina, was...	August 15, 1862	September 28, 1862
Lt. Gen. Leonidas Polk Leonidas Polk Leonidas Polk was a Confederate general in the American Civil War who was once a planter in Maury County, Tennessee, and a second cousin of President James K. Polk...  (temp)	September 28, 1862	November 7, 1862	Perryville Battle of Perryville The Battle of Perryville, also known as the Battle of Chaplin Hills, was fought on October 8, 1862, in the Chaplin Hills west of Perryville, Kentucky, as the culmination of the Confederate Heartland Offensive during the American Civil War. Confederate Gen. Braxton Bragg's Army of Mississippi won a...
Gen. Braxton Bragg Braxton Bragg Braxton Bragg was a career United States Army officer, and then a general in the Confederate States Army—a principal commander in the Western Theater of the American Civil War and later the military adviser to Confederate President Jefferson Davis.Bragg, a native of North Carolina, was...	November 7, 1862	November 20, 1862

Army of Mississippi (December 1862)

The second army was also referred to as the Army of Vicksburg. It was organized December 7, 1862, from troops in the Department of Mississippi and East Louisiana, including the short-lived Confederate Army of West Tennessee. Its sole function was to defend Vicksburg, Mississippi

Vicksburg, Mississippi

Vicksburg is a city in Warren County, Mississippi, United States. It is the only city in Warren County. It is located northwest of New Orleans on the Mississippi and Yazoo rivers, and due west of Jackson, the state capital. In 1900, 14,834 people lived in Vicksburg; in 1910, 20,814; in 1920,...

, and it ceased to exist when it surrendered to Maj. Gen. Ulysses S. Grant

Ulysses S. Grant

Ulysses S. Grant was the 18th President of the United States as well as military commander during the Civil War and post-war Reconstruction periods. Under Grant's command, the Union Army defeated the Confederate military and ended the Confederate States of America...

 on July 4, 1863.

Command History

Commander	From	To	Major Battles and Campaigns
Lt. Gen. John C. Pemberton John C. Pemberton John Clifford Pemberton , was a career United States Army officer who fought in the Seminole Wars and with distinction during the Mexican–American War. He also served as a Confederate general during the American Civil War, noted for his defeat and surrender in the critical Siege of Vicksburg in...	December 7, 1862	December 9, 1862
Maj. Gen. Earl Van Dorn Earl Van Dorn Earl Van Dorn was a career United States Army officer, fighting with distinction during the Mexican-American War and against several tribes of Native Americans...  (temp)	December 9, 1862	December 17, 1862
Lt. Gen. John C. Pemberton John C. Pemberton John Clifford Pemberton , was a career United States Army officer who fought in the Seminole Wars and with distinction during the Mexican–American War. He also served as a Confederate general during the American Civil War, noted for his defeat and surrender in the critical Siege of Vicksburg in...	December 17, 1862	July 4, 1863	Vicksburg Campaign Vicksburg Campaign The Vicksburg Campaign was a series of maneuvers and battles in the Western Theater of the American Civil War directed against Vicksburg, Mississippi, a fortress city that dominated the last Confederate-controlled section of the Mississippi River. The Union Army of the Tennessee under Maj. Gen....

Army of Mississippi (1863–64)

The third army was retitled III Corps, Army of Tennessee, around May 4, 1864, but it continued to use the former name.

Command History

Commander	From	To	Major Battles and Campaigns
Lt. Gen. William J. Hardee William J. Hardee William Joseph Hardee was a career U.S. Army officer, serving during the Second Seminole War and fighting in the Mexican-American War...	July 30, 1863	October 23, 1863
Lt. Gen. Leonidas Polk Leonidas Polk Leonidas Polk was a Confederate general in the American Civil War who was once a planter in Maury County, Tennessee, and a second cousin of President James K. Polk...	October 23, 1863	June 14, 1864	Atlanta Campaign Atlanta Campaign The Atlanta Campaign was a series of battles fought in the Western Theater of the American Civil War throughout northwest Georgia and the area around Atlanta during the summer of 1864. Union Maj. Gen. William T. Sherman invaded Georgia from the vicinity of Chattanooga, Tennessee, beginning in May...
Maj. Gen. William W. Loring William W. Loring William Wing Loring was a soldier from North Carolina who served in the armies of the United States, the Confederacy, and Egypt.-Early life:...	June 14, 1864	June 23, 1864