"United States" . . . . . . "Juvenile works" . . "Westward expansion" . . . . . . . . . . . . . . "Describes the history of American westward expansion, including the exploration of the frontier to the Pacific Ocean, the establishment of the Lone Star State and the Mormon kingdom of Deseret, Manifest Destiny, the California gold rush, the population of the plains, and the legacy of the American frontier." . . "West (U.S.)" . .