Controversial and unpopular, the U.S.-Mexican War divided the country's loyalties more than any event at the time since the Revolution. But the realities of the time were powerfully shaped by the belief in the myth of "Manifest Destiny" that the United States was predestined to occupy the North American continent "from sea to shining sea" and so a war of conquest was launched. When it was over, the United States had doubled its size at the expense of Mexico, which had shrunk by half. A fast-moving narrative filled with evocative and historically accurate detail, U.S.-Mexican War, Revised Edition tells the full story of a long-ignored but critical passage in American military history that was soon overshadowed by the Civil War. This new edition features a chapter focusing on the innovative military tactics and weaponry involved throughout the conflict.