U.S. Declassified Documents Online, formerly Declassified Documents Reference System, offers access to more than 750,000 pages of government documents. Covering major policy issues from the period before the Second World War into the twenty first century, the archive serves as a convenient source for documents from government departments including Defense; State; Treasury; CIA; and the White House. USDDO supports the study of history, politics, international relations, and journalism, among other fields.
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