[6] He helped to develop the draft of the Agrarian Reform Laws of Cuba in collaboration with Che Guevara, but was absent when the cabinet agreed final approval of the act.
[1][7] In May 1959, after the law was enacted, he resigned as minister, and joined Manuel Artime, Tony Varona, Carlos Prío and Aureliano Sánchez Arango in their subversive campaign to reduce communist influences in the government and armed forces.
Within days, Sorí Marín, Aldo Vera Serafin and many of their fellow anti-communists left Cuba to re-group in the United States.
Sorí Marín, with much support from CIA officer E. Howard Hunt, developed plans to increase armed terrorist activities in Cuba, and to overthrow the Castro administration.
[8] On the night of 13 March 1961, Sorí Marín, Rafael Diaz Hanscom, Manuel Puig Miyar, Nemesio Rodriguez Navarrete and Gaspar Domingo Trueba Varona landed from a boat at Fundora Point, Celimar, near Havana, with arms and explosives.
[9][10][11][12] Aldo Vera, a former revolutionary state security officer, and other members of the FRU continued to organize terrorist attacks, that included the El Encanto fire, and they also planned to rescue Sorí Marín and others from detention.