abstract
| - The Western Theater was an area defined by both geography and the sequence of campaigning. It originally represented the area east of the Mississippi River and west of the Appalachian Mountains. It excluded operations against the Gulf Coast and the Eastern Seaboard, but as the war progressed and William Tecumseh Sherman's Union armies moved southeast from Chattanooga, Tennessee, in 1864 and 1865, the definition of the theater expanded to encompass their operations in Georgia and the Carolinas. For operations west of the Mississippi River see Trans-Mississippi Theater of the American Civil War. The West was by some measures the most important theater of the war. The Confederacy was forced to defend with limited resources an enormous land mass, which was subject to Union thrusts along multiple avenues of approach, including major rivers that led directly to the agricultural heartland of the South. Capture of the Mississippi River was one of the key tenets of Union General Winfield Scott's Anaconda Plan. The Eastern Theater received considerably more attention than the Western, both at the time and in subsequent historical accounts. This is due to a number of factors, including the proximity of the opposing capitals, the concentration of newspapers in the major cities of the East, several unanticipated Confederate victories, and the fame of Eastern generals such as Robert E. Lee, George B. McClellan, and Stonewall Jackson. Because of this, the progress that Union forces made in defeating Confederate armies in the West and overtaking Confederate territory went nearly unnoticed. Military historian J. F. C. Fuller has described the Union invasion as an immense turning movement, a left wheel that started in Kentucky, headed south down the Mississippi River, and then east through Tennessee, Georgia, and the Carolinas. With the exception of the Battle of Chickamauga and some daring raids by cavalry or guerrilla forces, the four years in the West marked a string of almost continuous defeats for the Confederates; or, at best, tactical draws that eventually turned out to be strategic reversals. And the arguably most successful Union generals of the war (Grant, Thomas, Sherman, and Sheridan) came from this theater, consistently outclassing most of their Confederate opponents (with the possible exception of cavalry commander Nathan Bedford Forrest). The campaign classification established by the United States National Park Service is more fine-grained than the one used in this article. Some minor NPS campaigns have been omitted and some have been combined into larger categories. Only a few of the 117 battles the NPS classifies for this theater are described. Boxed text in the right margin show the NPS campaigns associated with each section.
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