Anyone who believes the U.S. Army did nothing but fight Indians between the Mexican War and the Civil War must read Durwood Ball's book. While fighting Indians did comprise an important part of the Army's mission in the American West, it also guarded the international borders with Mexico and Canada, attempted to stop fillibusters, protected U.S. interests, served as a frontier constabulary force, and intervened in civil unrest at the request of civil authorities (the California Gold Rush, the so-called Mormon rebellion in Utah, and the Kansas-Missouri violence in the 1850's to name just a few examples). The U.S. Army also faced trouble from within its own officer ranks as the year 1860 and the Civil War approached. Few officers were truly nationalized by service in the U.S. Army. Most were divided along sectional lines and viewed their duty primarily as one to their state or region rather than the U.S. government - their oaths not-withstanding. A few exceptions to this rule were Colonel Edwin V. Sumner and Captain Nathaniel Lyon, who placed national loyalty above that of sectionalism. This book also contains a very fair treatment of the Utah War of 1857-1858, something difficult to come by in most histories of the subject. Ball manages to treat both sides fairly and avoids the too-often prevalent bias against Brigham Young and the Mormons in Utah. Any student of history seeking to understand the U.S. Army in the decades before the Civil War would be well-advised to begin with this book.