Timeline of events leading to the American Civil War Timeline of events leading to the American Civil War This timeline of events leading up to the American Civil War describes and links to narrative articles and references about many of the events and issues which historians recognize as origins and causes of the Civil War. The pre-Civil War events can be roughly divided into a period encompassing the long-term build-up over many decades and a period encompassing the five-month build-up to war immediately after the election of Abraham Lincoln as President in the Election of 1860, which culminated in the Fall of Fort Sumter (April 1861). Since the early
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.