SabrinA Sanchez #22 May 16, 2016 Period 1 AP US History EQ?s American Imperialism To what extent did American economic and ideological interests benefit from the territorial expansion and imperialism of the late 1800s and early 1900s? The late 1800s marked a rise in imperialism in the U.S. After a war with Spain in 1898 the U.S. gained territory in the Pacific and in the Caribbean. Theodore Roosevelt expanded the original meaning of the Monroe Doctrine in Latin America. Antebellum To what extent did economic, political, and social factors in this era help promote expansion and the development of the ?American Dream??