The memorandum includes topics discussed between CPCz Secretary Vladimír Koucký and Cuban government official Carlos Rafael Rodríguez. Rodríguez lists points of misunderstanding between Cuba and other socialist countries. Discussion topics include Chinese publications in Cuba, Cuba's unique approach to socialist revolution, the proposed nuclear-free zone in Latin America, and building socialism under various conditions (e.g. Islam's role in Algeria), among others. Rodríguez encourages more communication among socialist nations to prevent misunderstanding.

Hungarian Ambassador to Cuba János Beck reports on Cuban-Soviet divergence after the Cuban Missile Crisis. Cuba’s divergence includes other socialist countries, while preserving a special relationship with Czechoslovakia. Beck offers criticism of Cuba’s leadership, politics, and independent stance, but along with the Soviet Union reinforces that Cuba is true to the revolution.

Rodriguez met with Koucky to clarify misunderstandings which could possibly arise because the reasons were not explained for Cuba’s positions on issues of the international communist movement, and for speeches and statements of some leading Cuban comrade.

Meeting between Raul Castro, Bohumir, Lomsky, and Langer. Castro informed Lomsky that internal danger has been eliminated, and contra-revolutionary and anti-government groups operating directly in Cuba have been broken up and practically destroyed. They evaluated the strategy of the cuba's defense, revised operational plans, and carried out number of changes. They originally approached the CSSR with a plea for a shipment of 200 pieces of 30 mm double cannons. The current situation, however (especially the situation in the DRV), is forcing them to ask for 30 mm cannons again.

Report on visit of Cuban Delegation in Czechoslovakia and conversation on 16 April 1965. This document contains information about visit of the Czechoslovak military delegation in Cuba on 30 March - 9 April 1965. There are attachments to the document: draft of the resolution, the report, report on important conversations in connection with the visit. The visit occurred at the time of heightened acts of aggression of the USA against the Democratic Republic of Vietnam, and thus it was regarded as highly important in Cuba. It contributed to strengthening of Cs. Cuban friendship and to strengthening of the friendship in arms of our armies.

Hungarian ambassador to Czechoslovakia Lajos Cséby summarizes Deputy Head of the Sixth Main Department [of the Czechoslovak Ministry of Foreign Affairs] Stross’s report on relations between Cuba and Czechoslovakia. Stross reports friendly relations between the two countries, which did not experience difficulties during the Cuban Missile Crisis. Stross outlines Cuba’s problems, economically and politically, and believes that Cuba’s revolutionary success depends on its economic growth. Cuba misunderstood the Soviet Union’s approach to the Cuban Missile Crisis. This led to signs of Chinese influence on Cuban politics, which Stross believes are reversing since Castro’s [1963] visit to the Soviet Union.

The document includes excerpts from a Bulgarian delegation's report on their visit to Latin America in 1960. The excerpt covers the delegation's visit to Cuba.

Avramova and Agnelov report Cuba's desire to establish diplomatic and cultural relations with Bulgaria. Cuba's interest paramountly involve trade. Avramova and Angelov summarize meetings with important government officials, particulalry Ernesto Guevara, head of the National Bank, and Raul Castro, Minister of Armed Forces. Topics include: the development of the revolution against the Batista government, post-Batista power struggles, geographical fatalism and US influence, Cuba's challenges (e.g. illiteracy, the lack of specialists), land and agricultural reform, construction, industrialization. The delegation recommends the establishment of official relations with Cuba and an invitation for Raul Castro to visit Bulgaria.

Resolution of the Bulgarian Communist Party to establish diplomatic relations with Cuba. A report is presented which describes current Cuban economic and trade relations with the Soviet Union, as well as Poland and Czechoslovakia.

Memorandum of Conversation between Czechoslovak Communist Party official Vladimir Koucky and Cuban Communist Party official Carlos Rafael Rodriguez that took place in Prague.

Czechoslovak Intelligence reports on a possible assassination plot against Castro and a possible coup against the Revolutionary Government in Havana. The document details the plot being planned by individuals in Havana including smuggling explosives into a public celebration for 1 May. Microfilms containing information on the plot including the organizers and place of action. It is obvious from this correspondence that the planned assassination and coup against Castro are part of the Bay of Pigs Invasion.