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.

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.

The Bulgarian diplomatic mission (legation or embassy) to the US reported to the Bulgarian Ministry of Foreign Affairs in Sofia what actions the embassy executed and planned to execute to prevent seizure of documents during the "international situation," or Cuban Missile Crisis. Enclosed in the letter is an explanation of items destroyed and items placed under heightened security. The letter also includes information about security for the embassy staff.

The commander of the Bulgarian 2nd Army, Colonel Alexiev, issued the order to prepare the Army's air defense for combat. Alexiev cites order N 00190/25.10.1962 issued four days prior to justify the heightened defense alert. The order includes six commands related to combat preparation and instructions for anti-aircraft units.

The Chief of Staff of the Bulgarian Navy issued an order to prepare the Navy for mobilization, citing a Bulgarian government declaration about the Cuban missile crisis. The Chief of Staff's secret order includes 19 specific commands for preparation. Commands include orders regarding necessary supplies for combat readiness, repair schedules, deployment, arming vessels, radio communication, and increased surveillance, among others. The Chief of Staff order includes reporting requirements and specific dates for execution.

Warning about the content of Castro’s declaration with regard to US threats against Cuba. Reference to the media and other authorities copies of the declaration.