Between 1846 and 1848, the United States and Mexico engaged in a conflict that resulted in major Mexican territorial losses and honed the battlefield skills of Ulysses S. Grant, Robert E. Lee, and other U.S. officers who later took part in the Civil War. The A–Z entries, many of them illustrated, range over such diverse subjects as abolitionists, the Battle of El Brazito, John C. Calhoun, Antonio Campazano, Manifest Destiny, and many more. A chronology provides an overview of key events, and an extensive bibliography of titles in both English and Spanish guides readers in further explorations. This volume will benefit anyone researching this important topic and will be particularly useful as a basic reference for introductory purposes.