Department of the West
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Department of the West was a major administrative and operational formation of the United States Army during the American Civil War, with its headquarters located in St. Louis, Missouri. The department was established to oversee the military operations in the Trans-Mississippi Theater, which included the states of Missouri, Arkansas, Indian Territory (present-day Oklahoma), and parts of Kansas, Louisiana, and Texas. The department played a crucial role in the war, with notable commanders such as Ulysses S. Grant, William Tecumseh Sherman, and Nathaniel Lyon contributing to its operations. The department's operations were closely tied to other major military formations, including the Army of the Tennessee and the Army of the Cumberland.
● History
The Department of the West was established on July 3, 1861, with John Fremont as its first commander, who had previously served as the Governor of California and had played a key role in the Mexican-American War. Fremont's command was marked by the Battle of Wilson's Creek, which was fought on August 10, 1861, near Springfield, Missouri, and involved the Missouri State Guard and the 1st Missouri Infantry. The department's early operations were also influenced by the Battle of Lexington, which took place from September 12 to 20, 1861, and involved the Missouri State Guard and the 1st Iowa Infantry. The department's history is closely tied to the Battle of Pea Ridge, which was fought from March 6 to 8, 1862, and involved the Army of the Southwest and the Trans-Mississippi Department. Other notable battles and events that occurred within the department's area of operations include the Battle of Prairie Grove, the Battle of Helena, and the Red River Campaign.
● Organization
The Department of the West was organized into several districts and divisions, each with its own commander and area of responsibility. The department was initially divided into the District of Missouri, the District of Kansas, and the District of Arkansas, with each district being responsible for the military operations within its respective state or territory. The department was also supported by various military units, including the 1st Missouri Light Artillery, the 2nd Missouri Light Artillery, and the 3rd Missouri Cavalry. The department's organization was influenced by the War Department, which was headed by Simon Cameron and later by Edwin Stanton. The department also worked closely with other military departments, including the Department of the Ohio and the Department of the Cumberland.
● Commanders
The Department of the West had several notable commanders during its existence, including Henry Halleck, who later became the General-in-Chief of the United States Army, and Ulysses S. Grant, who went on to become the 18th President of the United States. Other notable commanders of the department included William Tecumseh Sherman, who played a key role in the Atlanta Campaign and the March to the Sea, and Nathaniel Lyon, who was killed in action during the Battle of Wilson's Creek. The department's commanders also included John Pope, who later commanded the Army of Virginia, and Samuel Curtis, who played a key role in the Battle of Pea Ridge. The department's commanders worked closely with other notable military leaders, including George McClellan, Ambrose Burnside, and Joseph Hooker.
● Operations
The Department of the West was involved in several major military operations during the American Civil War, including the Battle of Shiloh, the Siege of Vicksburg, and the Red River Campaign. The department's operations were focused on securing the Mississippi River and defeating the Confederate States Army in the Trans-Mississippi Theater. The department's operations were also influenced by the Emancipation Proclamation, which was issued by Abraham Lincoln on January 1, 1863, and the Gettysburg Address, which was delivered by Lincoln on November 19, 1863. The department's operations were supported by various military units, including the Army of the Tennessee, the Army of the Cumberland, and the XV Corps. The department's operations were also influenced by the Bureau of Refugees, Freedmen, and Abandoned Lands, which was established by the Freedmen's Bureau Act.
● Geography
The Department of the West was responsible for a vast area of territory, including the states of Missouri, Arkansas, Indian Territory (present-day Oklahoma), and parts of Kansas, Louisiana, and Texas. The department's area of operations included several major rivers, including the Mississippi River, the Missouri River, and the Arkansas River. The department's geography was also marked by several major mountain ranges, including the Ozark Mountains and the Ouachita Mountains. The department's area of operations was also influenced by the Kansas-Nebraska Act, which was passed by the United States Congress in 1854, and the Homestead Act, which was passed by Congress in 1862. The department's geography played a crucial role in its operations, with the Battle of Pea Ridge being fought in the Boston Mountains and the Battle of Helena being fought in the Delta region of Arkansas.