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.

The cable reveals serious misgivings by the Cubans with regard to Soviet handling of the crisis. Roy Inchaustegui was criticized by Castro for discussing the question of document authenticity about the missile bases instead of discussing Cuba's right to defense at the UN Security Council. Pavlicek reports the Council asked on Czechoslovakia's stance towards Castro's 5 Points. While responding with support, he still asked for an official viewpoint from the Czechoslovak government in Prague.

Calderio's visit to Prague in the aftermath of the Cuban Missile Crisis served to solidify the ties between Cuba and Czechoslovakia, relations that would persist until the end of the Cold War. Among the activities of Calderio's visit included attendance of 12th Party Congress of the Czechoslovak Communist Party, meeting with Cuban ambassadors to China, Czechoslovakia and Hungary, and a promise to attend the meeting of the Bulgarian Communist Party.

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.

The report details a meeting between Deputy Foreign Minister Hajek with Cuban Foreign Minister Raul Roa. After a dinner banquet which is attended by all members of the Cuban foreign ministry and the Czechoslovak embassy, Hajek and Roa pay a visit to Ernesto "Che" Guevara, Chairman of the Cuban National Bank. Conversations ranged from Cuba's international status to ways of thwarting American aggression. It is noted that Guevara was highly paranoid of an American attack on Cuba.

Czech government decision in late September 1959, to approve sending what was euphemistically described as “special technical supplies” or “special technology” (but in truth were weapons, specifically 50,000 submachine guns and ammunition) to Havana, using a neutral Swiss firm as a cut-out to conceal the transaction, especially from American eyes.

This presents evidence of Czechoslovak-Cuban relations forming in 1959, which includes the somewhat sensitive issue of Prague’s attempting to grasp the relationship and balance of power within Havana’s rulers between Fidel Castro’s “July 26th” movement and the traditional, pro-Moscow communist party, the People’s Socialist Party (PSP).