Army of the Mississippi was the name given to two Union armies that operated around the

Mississippi River The Mississippi River is the List of longest rivers of the United States (by main stem), second-longest river and chief river of the second-largest Drainage system (geomorphology), drainage system in North America, second only to the Hudson B ...

, both with short existences, during the

American Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States. It was fought between the Union (American Civil War), Union ("the North") and t ...

History

1862

The first army was created on February 23, 1862, with Maj. Gen. John Pope in command. At its creation, the army consisted of 2 divisions of infantry for service along the

. When General Pope began to move against

New Madrid, Missouri New Madrid ( es, Nueva Madrid) is a city in New Madrid County, Missouri, United States. The population was 2,787 at the 2020 census. New Madrid is the county seat of New Madrid County. The city is located 42 miles (68 km) southwest of Cairo ...

, the army was expanded with units from neighboring military districts. The army now totaled 5 divisions commanded respectively by David S. Stanley, Schuyler Hamilton, John M. Palmer,

Eleazar A. Paine Eleazer Arthur Paine (September 10, 1815 – December 16, 1882) was an American lawyer, author and a Union officer from Ohio. He provoked controversy as a brigadier general in the Union Army during the American Civil War, while commanding o ...

and Joseph B. Plummer.

Gordon Granger Gordon Granger (November 6, 1821 – January 10, 1876) was a career U.S. Army officer and a Union general during the American Civil War, where he distinguished himself at the Battle of Chickamauga. Granger is best remembered for his part in the ...

commanded the Cavalry Division of two regiments and Napoleon B. Buford commanded the "Flotilla Brigade". In this capacity the Army fought at the

Battle of Island Number Ten The Battle of Island Number Ten was an engagement at the New Madrid or Kentucky Bend on the Mississippi River during the American Civil War, lasting from February 28 to April 8, 1862. Island Number Ten, a small island at the base of a tight dou ...

. After the capture of Island No. Ten, the army's divisions were consolidated into 3 divisions and became the "Left Wing" of Maj. Gen. Henry Halleck's Western Army Group. General Jefferson C. Davis's division from the

Army of the Southwest The Army of the Southwest was a Union Army that served in the Trans-Mississippi Theater during the American Civil War. This force was also known as the Army of Southwest Missouri. History Army of the Southwest Created on Christmas Day, 1861, th ...

was added, becoming the 4th Division. During the

Siege of Corinth The siege of Corinth (also known as the first Battle of Corinth) was an American Civil War engagement lasting from April 29 to May 30, 1862, in Corinth, Mississippi. A collection of Union forces under the overall command of Major General Henry ...

the Army of the Mississippi was consolidated into two wings of two divisions each. Maj. Gen. William S. Rosecrans commanded the "Left Wing" (1st and 2nd Divisions) and Brig. Gen. Schuyler Hamilton commanded the "Right Wing" (3rd and 4th Divisions). After the capture of Corinth, Pope was sent east to command the

Army of Virginia The Army of Virginia was organized as a major unit of the Union Army and operated briefly and unsuccessfully in 1862 in the American Civil War. It should not be confused with its principal opponent, the Confederate Army of ''Northern'' Virginia ...

and Maj. Gen. William S. Rosecrans assumed command of the Army of the Mississippi. The army was posted to the city of Corinth. Its position there was strengthened by two divisions from the Army of West Tennessee and fought at the battles of Iuka and

Corinth Corinth ( ; el, Κόρινθος, Kórinthos, ) is the successor to an ancient city, and is a former municipality in Corinthia, Peloponnese, which is located in south-central Greece. Since the 2011 local government reform, it has been part ...

. Rosecrans was transferred to command of the

Army of the Ohio The Army of the Ohio was the name of two Union armies in the American Civil War. The first army became the Army of the Cumberland and the second army was created in 1863. History 1st Army of the Ohio General Orders No. 97 appointed Maj. Gen. ...

and the current army was discontinued in October 1862 and the regiments were dispersed between the XIII Corps and

XIV Corps 14 Corps, 14th Corps, Fourteenth Corps, or XIV Corps may refer to: * XIV Corps (Grande Armée), a unit of the Imperial French Army during the Napoleonic Wars * XIV Corps (German Empire), a unit of the Imperial German Army prior to and during World ...

1863

In 1863 Maj. Gen.

John A. McClernand John Alexander McClernand (May 30, 1812 – September 20, 1900) was an American lawyer and politician, and a Union Army general in the American Civil War. He was a prominent Democratic politician in Illinois and a member of the United States H ...

was put in command of the expedition against down the Mississippi. He was given command of two corps from the

Army of the Tennessee An army (from Old French ''armee'', itself derived from the Latin verb ''armāre'', meaning "to arm", and related to the Latin noun ''arma'', meaning "arms" or "weapons"), ground force or land force is a fighting force that fights primarily on ...

, his own XIII Corps led by Brig. Gen.

George W. Morgan George Washington Morgan (September 20, 1820 – July 26, 1893) was an American soldier, lawyer, politician, and diplomat. He fought in the Texas Revolution and the Mexican–American War, and was a general in the Union Army during the Americ ...

and Maj. Gen.

William T. Sherman William is a male given name of Germanic origin.Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 276. It became very popular in the English language after the Norman conquest of Engl ...

's XV Corps. McClernand named his force the "Army of the Mississippi" and redesignated the XIII Corps the I Corps, Army of the Mississippi, and the XV Corps became the II Corps, Army of the Mississippi. McClernand was successful in capturing Arkansas Post. Maj. Gen.

Ulysses S. Grant Ulysses S. Grant (born Hiram Ulysses Grant ; April 27, 1822July 23, 1885) was an American military officer and politician who served as the 18th president of the United States from 1869 to 1877. As Commanding General, he led the Union A ...

did not like McClernand and after Sherman and Admiral Andrew H. Foote both voiced their opinions that McClernand was unfit to command, Grant personally took command of the expedition against Vicksburg and the old XIII Corps and XV Corps were returned to the Army of the Tennessee on January 12, 1863.

Command history

1862 1863

References

* Eicher, John H., & Eicher, David J., ''Civil War High Commands'', Stanford University Press, 2001, .

External links

Army Organization during the Civil War

{{Union Army Formations Mississippi, Army of the Missouri in the American Civil War Mississippi in the American Civil War Arkansas in the American Civil War 1862 establishments in the United States Military units and formations established in 1862 Military units and formations disestablished in 1863 1863 disestablishments in the United States