Che Guevara

Guevara with members of his "reception committee" at Havana airport
(Havana - 14 March 1965)

Pressed by international speculation regarding Guevara's fate, Castro stated on 16 June 1965, that the people would be informed about Guevara when Guevara himself wished to let them know. Numerous rumors about his disappearance spread both inside and outside Cuba. On 3 October of that year, Castro revealed a hand written undated letter[49] purportedly written to him by Guevara some months earlier in which Guevara reaffirmed his enduring solidarity with the Cuban Revolution but declared his intention to leave Cuba to fight abroad for the cause of the revolution. He explained that "Other nations of the world summon my modest efforts," and that he had therefore decided to go and fight as a guerrilla "on new battlefields". In the letter Guevara announced his resignation from all his positions in the government, in the party, and in the Army, and renounced his Cuban citizenship, which had been granted to him in 1959 in recognition of his efforts on behalf of the revolution.

During an interview with four foreign correspondents on 1 November, Castro remarked that he knew where Guevara was but would not disclose his location, and added, denying reports that his former comrade-in-arms was dead, that "he is in the best of health." Despite Castro's assurances, Guevara's fate remained a mystery at the end of 1965 and his movements and whereabouts continued to be a closely held secret for the next two years.