sentences:  When the Cuban Revolution (1953–1959) established a Communist government with ties to the Soviet Union, it was argued that the Monroe Doctrine should be invoked to prevent the spread of Soviet-backed Communism in Latin America.Under this rationale, the U.S. provided intelligence and military aid to Latin and South American governments that claimed or appeared to be threatened by Communist subversion (as in the case of Operation Condor).In the Cuban Missile Crisis of 1962, President John F. Kennedy cited the Monroe Doctrine as grounds for America's confrontation with the Soviet Union over the installation of Soviet ballistic missiles on Cuban soil.