In January 1962, Cuba was suspended from the Organization of American States (OAS), and later the same year the OAS started to impose sanctions against Cuba of similar nature to the U.S. sanctions. The Cuban Missile Crisis occurred in October 1962. By 1963, Cuba was moving towards a full-fledged Communist system modeled on the USSR.
During the 1970s, Fidel Castro dispatched tens of thousands of troops in support of Soviet-supported wars in Africa. He supported the MPLA in Angola and Mengistu Haile Mariam in Ethiopia.
The standard of living in the 1970s was “extremely spartan” and discontent was rife. Fidel Castro admitted the failures of economic policies in a 1970 speech. In 1975 the OAS lifted its sanctions against Cuba, with the approval of 16 member states, including the U.S. The U.S., however, maintained its own sanctions.