English: Approximate battle locations and routes of major Union and Confederate army campaign operations in the Trans-Mississippi theater between 1861 and 1865, including early movements in the Ozarks, the 1862 New Mexico campaign, 1863 Gulf operations, the 1864 Red River campaign with associated movements in Arkansas, and Price's 1864 campaign in Missouri and eastern Kansas. The map is not drawn to a precise scale, but intends to represent relationships of locations and routes in the area over time.