- The Civil War in the (Real) West Because of the number of people are unaware that the Civil War extended as far west as New Mexico and Arizona, we are featuring a number of books that explore the exploits of those soldiers who fought in what is now the Southwestern United States.We hope you enjoy our selection of books about The Civil War in the American West. Sibley's New Mexico Campaign-Martin ...www.guidon.com/westcvwr.html