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Trans-Mississippi theater of the American Civil War
Military operations west of the Mississippi River
Trans-Mississippi theater of the American Civil War
The trans-Mississippi theater of the American Civil War was the scene of the major military operations west of the Mississippi River. The area is often thought of as excluding the states and territories bordering the Pacific Ocean, which formed the Pacific coast theater of the American Civil War (1861–1865). The campaign classification established by the National Park Service of the U.S. Department of the Interior 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 75 major battles the NPS classifies for this theater are described. Boxed text in the right margin show the NPS campaigns associated with each section. Activity in this theater in 1861 was dominated largely by the dispute over the status of the border state of Missouri. The Missouri State Guard, allied with the Confederacy, won important victories at the Battle of Wilson's Creek and the First Battle of Lexington...
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