This four-volume encyclopedia chronicles the historical roots of the United States' current military dominance, documenting its growth from continental expansionism to hemispheric hegemony to global empire.

* Overviews the history of American imperialism through chronologically arranged entries that are multidisciplinary, incisively written, and informed by the latest scholarship

* Covers issues ranging from the fur trade of the frontier era to today's complex engagement in the Middle East and Africa

* Shares key insights on the intersection of popular culture with the projection of U.S. military power

* Includes background material and an extensive selection of primary documents that will help students practice critical reading, thinking, and writing skills

* Features numerous photos, illustrations, and sidebars that enliven the text and engage students in participatory learning