The American Ol West comprises the history, geography, peoples, lore, and cultural expression of life in the Western United States, most often referring to the period of the later half of the 19th century, between the American Civil War and the end of the century. More encompassing and more accurate, however, is the inclusion of the entire 19th century. Through treaties with foreign nations and native peoples, political compromise, technological innovation, military conquest, establishment of law and order, and the great migrations of foreigners, the United States expanded from coast to coast, fulfilling the call of Manifest Destiny. In securing and managing the West, the federal government greatly expanded its powers, as the nation grew from an agrarian society to an industrialized nation. First promoting settlement and exploitation of the land, by the end of the 19th century the federal government became a steward of the remaining open spaces. As the American Old West passed into history, the myths of the West took firm hold in the imagination of Americans and foreigners alike.