In a conversation with the head of the CPCz international department in May 1963, PCB First Secretary Mario Monje reveals the extent of his party’s modus vivendi with Paz Estenssoro’s governing Revolutionary Nationalist Movement (MNR). According to Monje, the Bolivian president was "heavily involved" with Operation Matraca, an ongoing Cuban-sponsored guerrilla operation targeting the military governing in neighboring Peru.

An aide-memoire requesting that the United Nations take measures to prevent the further persecution of the Overseas Chinese in Indonesia following the March 1963 anti-Chinese riots in that country.

A North Korean political officer speaks of Kim Il Sung's firm belief that an American nuclear attack could not destroy North Korea for their country would find refuge in the maze of underground caverns.

Agreement between the government of Cuba and the government of the USSR concerning the installation of technical equipment of the Revolutionary Armed Forces, and in reinforcing the defensive capacity of the Republic of Cuba and annexes. Includes timetables and charts outlining the import of resources from the Soviets to the Cubans over a period of several years.

Cable from a Polish official in Saigan, Maneli, to Warsaw. detailing talks with Vietnamese officials and the Soviet ambassador. They discuss the investigations of the ICC, and the importance of probes into the Vietnamese situation. The Soviet ambassador notes that Soviet-Vietnamese relations have shifted.

The document is a telegram to Sergio del Valle Jimenes about the agreement reached between the USSR and Cuba. Both governments decided to annul the 30 Sept. 1961 agreement (Annex I) for airplanes, materials, and spare parts.

Report from Polish official in Saigon, Maneli, to Warsaw, on his meeting with Pham Van Dong. Dong describes plans for South Vietnam's future government and neutrality, along with North Vietnam's compliance with the Geneva Accords. Reports that Soviet Ambassador Tovmassian was surprised at the high degree of Chinese participation in Vietnam.

Fidel Castro decides on dates for his visit to the Soviet Union, discusses publicity and a potential hunting trip with Khrushchev, and requests that the details of the trip remain secret.

Zhou and Sirik Matak discuss the treatement Chinese doctors offered to Queen Sisowath Kossamak, Chinese economic aid to Cambodia, and civil disturbances in Cambodia.

Bulgarian Embassy in Athens staff member Atanasov reports on Greek media accounts of military preparations to the Bulgarian Ministry of Foreign Affairs. According to Atanasov, Greek newspapers report preparations include Soviet movements in the Mediterranean in response to US submarines carrying Polaris missiles, Bulgarian maneuvers near the Greek and Turkish borders, and an anticipated NATO forward strategy in Greece. Atanasov adds that NATO is preparing the defense of possible attacks on Greece.

Fidel Castro meets artists of the Shevchenko Kiev Theater and directs the Council of Culture to arrange the Theater's concerts around the country.

Chargé d’Affaires ad interim Erzsébet Görög adds to a television report of Fidel Castro’s visit to the Soviet Union from 27 April-3 June 1963. Görög makes note of the fact that Castro uses a television interview to describe his trip instead of a standard, large speech. Görög finds a charismatic appeal in Castro.

Vasily Moskovsky gives Kim Il confidential information regarding the foreign policy of the USSR and discusses the visit made by Fidel Castro to a missile regiment in the USSR.

Criticisms of the DPRK are made about Kim Il Sung's personality cult, concealment of socialist countries' support, waning cooperation with socialist countries, intensification of China-North Korea cooperation, and distancing from the Soviet Union.

Hungarian Ambassador to Cuba József Szipka reports on Soviet-Cuban relations from the early stages of the Cuban revolution to the present. The Cuban government depends on economic, military and political aid; trade agreements; and cultural and scientific exchanges from socialist governments, primarily the Soviet Union. Szipka adds that the Soviet Union’s flexible political steps during the Cuban Missile Crisis ensured Cuba’s security from a US invasion. From Szipka’s perspective, the missile crisis was a valuable learning experience for Cuban officials.

This NIE comes to the general conclusions that “there will not be a widespread proliferation of nuclear weapons over the next 10 years” and discusses programs in various countries (Israel, China, Sweden, India, West Germany, Japan, etc.) This copy includes newly declassified references to the Israeli nuclear weapons program, including the conclusion that “the Israelis, unless deterred by outside pressure, will attempt to produce a nuclear weapon some time in the next several years.”

Deputy Forieng Minister Lubomir Angelov transmits to Bulgaria's embassy in Turkey information from Bulgarian Ambassador to Great Britain Radenko Grigorov. Angelov's message is handwritten and reports news about Soviet and US submarine presence in the Mediterranean, which initially Grigorov acquired from Turkey's ambassador to Great Britain.

Chargé d’Affaires ad interim Erzsébet Görög writes a preliminary assessment of Castro’s state visit to the Soviet Union in 1963. Görög reports on improvements in Cuba’s party organization and positive reactions from the Cuban public and media on Castro’s visit. Görög notes different reactions to the visit between the economic/technical and artistic intelligentsia, adding that “Khrushchev managed to win Fidel over to his side in the Soviet-Chinese dispute.” Other topics include emigration and external counter-revolutionary activities.

This agreement between the representatives of seven Soviet and seven Czechoslovak security agencies relates to enhanced security coordination between the two countries. The parties agree to share technological changes, various resources and intelligence that is relevant to state security.