During the Cuban Insurrection in the 1950s, Santiago Armada (Chago Armas) was involved with the launch of a clandestine radio station. He also became an illustrator of the clandestine El Cubano Libre periodical, for which he was in charge of the humorous supplement. There, he made numerous caricatures of his fight companions and illustrations. He also created the comic character 'Julito 26', whose name was inspired by the historical day of the beginning of the armed struggle against the Batiste regiment in 1953.
After the Revolution in 1959, 'Julito 26' is continued in the magazine Revolución. Chago also collaborated on periodicals like El Pitirre y Bohemia and Palante. Chago grew artistically during these years, as can be seen in his existential series 'Salomón', and also 'El Humor Otro' and 'El Humor Ninguno'. He was the founder of the Granma periodical in 1965, that ran for several years. In the later stages of his career, Chago focused on painting. Chago died prematurely of a heart attack on 6 June 1995.