The Bulgarian Embassy in Havana reports to the Central Committee of the Bulgarian Communist Party and the Bulgarian Ministry of Foreign Affairs on political, economic, and cultural developments in Cuba circa 1963. Cuba is politically united, but is experiencing economic hardship after the “Caribbean Crisis” primarily because of the US embargo. In the report, embassy staff reviews developments between socialist countries and Cuba throughout 1963. Some examples include communist aid to Cuba after Hurricane Flora and Cuba’s stance on Sino-Soviet relations. Bulgaria’s show of solidarity resulted in concrete political, economic, and cultural cooperation. Embassy staff notes the drawbacks and benefits of Bulgaria’s relationship with Cuba.

Bulgaria's General Consul in Istanbul, Turkey, reported to the Ministry of Foreign Affairs information he received from the Chief of the Greek General Staff to Turkey. As recorded, the Greek General Staff reported a meeting between Turkish and Greek governments. The governments discussed a non-aggression pact between Warsaw Pact and NATO countries and the use of Polaris missile submarines in Turkish waters.

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.

Bulgarian Ambassador to Greece Nikolai Minchev relays recent newspaper reports to the Bulgarian Ministry of Foreign Affairs. Minchev summarizes a recent NATO meeting in Athens where NATO staff and Turkish and Greek military personal discussed security in the two nations and the Balkan region as a whole.

Bulgarian Charge d’Affaires in the US Kiril Shterev reports to the Bulgarian Ministry of Foreign Affairs that US Deputy Secretary of Defense Roswell Gilpatric stated that three submarines carrying Polaris missiles will be deployed to the Mediterranean Sea. The deployment follows US withdrawal from Italian and Turkish bases after the Cuban Missile Crisis.

Bulgaria's Charge d' Affaires to the US Kiril Shterev writes to the Bulgarian Ministry of Foreign Affairs explaining that the US planned on stationing B47 bombers in Turkey once the Jupiter missiles are removed from Turkey. Shterev cites journalist Paul Scott as his source for the information about the display of the Unites States' military presence.

Following the Cuban Missile Crisis, General Diko Dikov, the Minister of Internal Affairs, drafted a report for General Semerdzhiev covering military movements inside West Germany(Federal Republic of Germany). Dikov includes a brief description of NATO and English military mobilization along with civilian preparations influenced by propaganda during the crisis.

In a letter from the Bulgarian Embassy to Cuba to the Bulgarian Ministry of Foreign Affairs, Deputy Chief of Mission Hubenov writes that confidential archives of the embassy were destroyed at the order of Ambassador Konstantin Michev. Two protocols and a list of demolished materials are referenced in the letter, but not included.