Produced by the State Department's Office of the Historian, this is the official documentary record of U.S. foreign policy. Volumes are arranged by presidential administration, geographic region, and topic area. These volumes are generally declassified and publicly released 30 years after they were written.
Searchable database of previously classified federal records spanning the twentieth and twenty first centuries. The types of materials include intelligence studies, policy papers, diplomatic correspondence, cabinet meeting minutes, briefing materials, and domestic surveillance and military reports. Database allows users to to locate the full text of documents and filter their search results by document type, issue date, source institution, classification level, and date declassified as well as other document characteristics.
This agency is responsible for cryptographic and signals intelligence operations and analysis. Their FOIA website features the text of reports on historic NSA activities such as the Gulf of Tonkin incident, Cuban Missile Crisis, John F. Kennedy's assassination, and the Venona program documenting Soviet espionage in the U.S. from 1943-1980.
The National Security Archive is a research institution that is part of George Washington University. The Electronic Briefing Books are collections of declassified U.S. Government documents on foreign policy, intelligence, and national security topics from various government agencies.