"Encompasses nearly two decades of American history, beginning with the farm crisis of the mid-1920s, through the 1929 stock market crash, the gradual recovery during the 1930s with Franklin D Roosevelt's New Deal and World War II...

Contains "alphabetically arranged entries that focus on the period's scientific, social and cultural history as well as the political, military and economic developments...

Decade-by-decade coverage of American social history during the 20th century...

"Covers major American conflicts from the Colonial Wars through the War on Terrorism in the context of cultural and social events and conditions on the home front...

Contains 2,500 entries...

Contains entries on the principal battles and campaigns, key military and political figures, and the political maneuvering during the Spanish-American and Philippine-American Wars...

Contains more than 400 articles (along with maps, pictures and photographs) on the colonial empire of Portugal, Spain, France, Great Britain, the Netherlands, Belgium, Germany, Italy and the United States from the voyages of Prince Henry the Navigator of Portugal to the present...

Contains lengthy discussions, arranged in chronological orders, of wars in American history from 1621 to the present, including the War on Terrorism...

Contains the texts of "key sources as well as a guide to the documents, a path through them and essential data on the role, form and vocabulary of treaties in general...

Contains more than 1800 entries covering every aspect of the war "including, detailed surveys of major countries; politics and grand strategy; domestic and economic issues; resistance and intelligence services; campaigns, battles, and military operations; warfare and weapons; wartime leaders and influential people; and slogans and phrases...

Contains entries which give "in-depth global coverage on this scale to the modern phenomenon of fascism from its first stirrings in the nineteenth century up to the beginning of the new millennium...

"This encyclopedia treats the causes, course, and effects of World War I...

Contains 950 entries, including biographies of individuals, studies of battles, details of weapons systems, and analyses of wartime conferences...