The Army of the Southwest was a Union Army that served in the Trans-Mississippi Theater during the Civil War.
History
Created on Christmas Day, 1862, the Army of the Southwest was composed of troops from the Department of Missouri. The principle commander of the army was Brigadier General Samuel R. Curtis but several other officers commanded the army for brief periods of time for the rest of the war. Curtis led the army into its greatest engagement of the war at the Battle of Pea Ridge. After capturing Helena, Arkansas later that year the army ceased to be of great significance for the rest of the war.
Commanders
Major Battles
Source
http://www.civilwarhome.com/armyofsouthwest.htm
http://www.civilwarchronicles.com/commanders.htm