Use this Discovering American History video entitled The Territorial Expansion of the United States to study the territorial growth of the United States, and how supported by the ideology of "Manifest Destiny," Americans added Oregon, Texas, California, and the Southwest to the nation's territory. Learn about how through diplomacy and war, the U.S. became a continental nation and how settlers repeated the old pattern of initial friendliness to natives and earlier settlers, followed by hostility and domination.
Learn about The Territorial Expansion of the United States.