The U.S.-Mexican War had lasting impacts on both countries, most notably allowing the United States to expand to the Pacific Ocean. The United States' desire to stretch from sea to shining sea had become one of the chief goals of the new country. In this volume, readers will learn about the beginnings of U.S. westward expansion and Mexican independence from Spain. This book delves into the economic, political, and historical background behind the U.S.-Mexican War, and the effects in both Mexico and the United States. Engaging text is brought to life by photographs, artwork, and primary sources. Readers are sure to walk away with a clear understanding of this landmark period in American history.