Troop engagements of the American Civil War, 1861 be the Confederate Territory of Arizona and raised several militia companies, which fought several skirmishes with both the Union forces remaining in the territory and the Apache tribes. Troop engagements of the American Civil War, 1861 The following is a list of engagements that took place in 1861 during the American Civil War. The war started on April 12 when Confederate forces commanded by General P. G. T. Beauregard opened fire on the Union garrison of Fort Sumter in the harbor of Charleston, South Carolina; after a thirty-four-hour bombardment, the Union garrison surrendered. There had been no casualties during the
Trans-Mississippi Theater of the American Civil War representatives on June 23, 1865. Trans-Mississippi Theater of the American Civil War The Trans-Mississippi Theater of the American Civil War consists 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.