In 1957 , Fonseca traveled to the Soviet Union as a PSN delegate to the 6th World Festival of Youth and Students organized by the World Federation of Democratic Youth . Fonseca later wrote a book chronicling his visit to the USSR entitled '' Un Nicaragüense en Moscú '' ( " A Nicaraguan in Moscow " ) . The book featured uncritical praise of the accomplishments of the Soviet government , including its " free press , complete freedom of religion and the efficiency of its worker-run industries . " Fidel Castro and the 26th of July Movement took power in Cuba on January 1 , 1959 . The Cuban Revolution was a major event all over Latin America and sparked both great concern and a sense of possibility in Nicaragua . The Cuban Revolution was a central event in Fonseca 's political evolution as it convinced him that a revolution was possible and that organisation was necessary . . Just as the Cuban revolution was organized outside the framework of the Cuban Communist Party , he came to believe that a Nicaraguan revolutionary movement could be created outside of the PSN and other pre-existing groups . The rebel victory in Cuba was mirrored by an increase in armed anti-Somoza actions in Nicaragua . Fonseca took part in one such uprising in 1959 . In February of that year , Fonseca , as well as many other more prominent Nicaraguan radicals , traveled to Cuba . In mid-1959 , Fonseca joined a Nicaraguan guerrilla brigade which had a training camp in southern Honduras . On June 24 , 1959 , the brigade was ambushed by Honduran and Nicaraguan troops in Honduras , ending in the death of several rebels and the wounding and capturing of many others , including Fonseca . The incident marked the end of Fonseca 's relationship with the PSN . Whereas Fonseca 's revolutionary zeal increased in the aftermath of the ambush , the PSN became convinced that a revolution in Nicaragua was impossible . Labelling Fonseca and other Nicaraguans who fought in the brigade as too " guerrilla-ist , " the PSN expelled Fonseca and the others . Fonseca managed to leave the military hospital in Honduras where he was taken after the June 24th ambush and went to Cuba . There , he began to seriously study Augusto César Sandino . Fonseca also began to host political meetings in a small apartment in the Miramar section of Havana . The meetings were frequented by people who would later become part of the FSLN
6th World Festival of Youth and Students
6th World Festival of Youth and Students
Carlos Fonseca