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Digital Archive International History Declassified

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Intelligence Operations in the Cold War

This is a collection of primary source documents that discuss intelligence issues during the Cold War. The documents come from archives in many different Soviet bloc countries. They are mainly decision memorandums, descriptions, agreements, and reports. The collection includes mainly bilateral agreements for cooperation between Communist countries and domestic intelligence reports from Bulgaria. See also the Mitrokhin Archive and the Vassiliev Notebooks. (Image, KGB symbol)

  • March 25, 1955

    Information on Turkish Intelligence Interest on the Uranium Mine Buhovo

    Turkish intelligence agents are trying to gather information on the uranium mining in southwest Bulgaria. They believe that the extracted deposits are shipped to the Soviet Union for further processing and production of nuclear bombs.

  • March 29, 1955

    Bulgarian Politburo Resolution B Regarding DS Intelligence Directorate Work

    BCP CC’s First Secretary, Vulko Chervenkov, approves Interior Minister Georgi Tsankov’s recommendations for improving the performance of the intelligence and counter-intelligence services.

  • November 01, 1956

    Bulgarian Military Intelligence Information on the Situation in Hungary and Poland

    This intelligence report discusses the domestic political developments in Poland after the ascent of Wladyslaw Gomulka to the top of the Polish United Workers' Party (PZPR).The events surrounding the Hungarian Revolution of 1956 are also mentioned.

  • January 08, 1957

    Information on Turkish and Greek Intelligence Services Activity Against Bulgaria in 1956

    A report focused on the Turkish and Greek intelligence activities in Bulgaria. The report outlines the major areas of interest – the Bulgarian military infrastructure, economic development, and the Communist party leadership. The report also talks about the role of the Turkish diplomatic representatives in encouraging repatriation of Turkish-Bulgarians to Turkey.

  • March 07, 1958

    Protocol on coordination of the Czechoslovak Interior Ministry delegation and border troops of the Soviet Union on state security

    This protocol resulted from a meeting between the Czechoslovak interior ministry and Soviet border troop representatives. The two parties convened to coordinate public safety measures undertaken in protection of the Czechoslovak-Soviet border.

  • March 12, 1958

    Report from Gen. M. Spasov on Multilateral Security Meeting in Bucharest

    A report by the Deputy Minister of Internal Affairs, Mircho Spasov, on the Ministerial Meeting in Bucharest of delegations from Romania, Bulgaria, Czechoslovakia, Hungary, and the Soviet Union. The meeting called for focusing on preventing subversive acts of Western intelligence, improving exchange of information, and conducting joint operations.

  • November, 1958

    East German Ministry of State Security, 'New Methods of Operation of Western Secret Services'

    Assessment by the Stasi of changes to operations made by the main Western secret services in response to Khrushchev's November 1958 diplomatic note to the United States, Britain, and France demanding an end to the occupation of West Berlin.

  • December, 1958

    Agreement between the KGB and the interior ministry of the Czechoslovak Socialist Republic on governmental officials' advisory roles

    The KGB and the Interior Ministry of the Czechoslovak Republic met to discuss article 8 of the Treaty between the governments of the USSR and CSSR on the broadcast of Soviet specialists in the CSSR and Czechoslovak specialists in the USSR for the purpose of providing technical help and various services. Payment for services rendered is discussed.

  • December, 1958

    Regulations for the switch-board and high-frequency telephone lines between the USSR and Czechoslovak Socialist Republic

    This convention was drawn up by both parties based on article 12 of the Convention between the governments of the USSR and Czechoslovak Socialist Republic. It concerns government-owned, high-frequency telephone lines connecting Moscow and Prague. Technical specifications are laid out, as are ways to ensure the confidentiality of information relayed along these telephone lines.

  • March 23, 1959

    Report on Visit to Romania on Counterintelligence Issues

    A report on the visit that had to improve exchange of information between the two intelligence agencies.

  • June 17, 1959

    Information on French Intelligence Activity Against Bulgaria

    The memo focuses on the operations of the French intelligence services in Bulgaria during the late 1950s.

  • June 17, 1959

    Information on Foreign Counterintelligence Agents Network Abroad

    The report covers the work of Bulgarian intelligence operatives in the West for the last 18 months. Includes statistics by country.

  • September 26, 1959

    Report by Chairman of the Committee for State Security on American "Discoverer" Satellites

    A report to the CC CPSU on six American "Discoverer" model satellites with speculation about the satellites' military or surveillance purposes.

  • October 06, 1959

    Report by the Director of CC CPSU Department of Military Industry on the American 'Discoverer' Satellites

    Report outlining the need to organize systematic observation of newly launched American "Discoverer" satellites to determine their orbit and radio frequencies.

  • June 07, 1960

    Note from KGB Chairman A. Shelepin to Central Committee of the Communist Party of the Soviet Union, Regarding Plan to Discredit CIA Chief Dulles

    Shelepin sets out a plan to discredit CIA chief Allen Dulles.

  • June 16, 1960

    Memorandum by the Chairman of the Committee for State Security on Disruption of Soviet Missiles

    Shelepin reports on intelligence claiming that US scientists have developed a method to disrupt the guidance of Soviet missiles during launch.

  • July 21, 1960

    Report by Ustinov on the Alleged US Ability to Disrupt Soviet Missile Guidance

    Ustinov analyzes reports that American scientists have developed a method for disrupting the guidance systems on Soviet missiles and concludes that this is not possible.

  • January 11, 1961

    Information from MVR Inspectorate on Yugoslav Intelligence Services Against Bulgaria

    The Ministry of Internal Affairs reports its intelligence findings on the activities of the Yugoslav intelligence services against Bulgaria. Working both from home and in-country, the Yugoslav intelligence is allegedly trying to gather information on a broad set of issues – ranging from trade relations within Comecon, to Bulgaria’s military capacity and its potential to pose a threat to Yugoslav Macedonia.

  • March 06, 1961

    Protocol on the joint negotiations of the Czechoslovak Interior Ministry delegation and the delegation of KGB border troops

    The Czechoslovak and Soviet delegations discussed the fulfillment of the 1958 joint proceedings on Soviet border troops, further coordination of the border organs of both parties, the relay of technical equipment at the border and joint actions for border searches. Also on the agenda was the easing of border passage in times of emergency for citizens of both states.

  • June, 1961

    Record of proceedings between the Soviet KGB and the Interior Ministry of the Czechoslovak Socialist Republic on the expansion of intelligence cooperation

    This document chronicles what was discussed between the KGB and Czechoslovak Interior Ministry concerning the coordination of intelligence and counter-intelligence acquisition and joint implementation of some of these measures. Global foreign policy and intelligence measures are discussed in places as diverse as the USA, NATO countries, Mexico, Brazil, Argentina, the Vatican, Guatemala, Cuba, the Congo, Angola, Indonesia, India, England and France. The Czechoslovak Socialist Republic and the Soviet Union pledge to fight perceived imperialist threats from the USA in Latin America, Africa, the Near and Middle East and Southeast Asia. The document lists companies of interest to the two parties, primarily scientific, armament and machine factories and companies.