Book excerpt: Although the New Mexico Territory was far distant from the main theaters of war, it was engulfed in the same violence and bloodshed as the rest of the nation. The Civil War in New Mexico was fought in the deserts and mountains of the huge territory, which was mostly wilderness, amid the continuing ancient wars against the wild Indian tribes waged by both sides. The armies were small, but the stakes were high: control of the Southwest. Retired lieutenant colonel and Civil War historian Dr. Walter Earl Pittman presents this concise history of New Mexico during the Civil War years from the Confederate invasion of 1861 to the Battles of Valverde and Glorieta to the end of the war.