Marxism–Leninism Cuban Revolution, led by Fidel Castro and Ché Guevara, overthrew the régime (1925–1959) of Fulgencio Batista to establish the Republic of Cuba, a Communist state recognised by the Soviet Union. In response, the United States attempted a coup d'état against the Castro government, such as the unsuccessful Bay of Pigs invasion (April 1961), by anti-communist Cuban exiles, sponsored by the CIA. The next year, there occurred the Cuban missile crisis (October 1962), a diplomatic dispute between the United States and the Soviet Union over the presence of medium-range, Soviet nuclear missiles in Cuba. The Soviet Union resolved the nuclear-missile crisis
CIA activities in Nicaragua government eventually grew stronger and British influence faded. Background Information and the Precipitation of the Contra Conflict In 1961, the Frente Sandinista de Liberacion Nacional (FSLN) was founded in Havana, Cuba. The development of the FSLN represented the merger of "Carlos Fonseca's Nicaraguan Patriotic Youth organization ... with Tomas Borge's Cuban-supported insurgent group." The FSLN remained a largely unsuccessful and marginal political movement until 1972, when an earthquake rocked the Nicaraguan capital, Managua. The Somoza government, which had assumed control of Nicaragua shortly following the withdrawal of United States military personnel in 1933, was seen to be profiteering from international