Lens, Sidney. The forging of the American empire : [from the revolution to Vietnam, a history of U.S. imperialism / by Sidney Lens. - London ; : Pluto Press ; c2003. - xii, 464 p. ; Originally published: New York : Crowell, 1971. ISBN: 0745321011 (hardback) Subjects--Topical Terms: Imperialism-History.---United States-Foreign relations.-United States-Territorial expansion. Dewey Class. No.: 327.73 / Fo