In March 1960, U.S. President Dwight D. Eisenhower gave his approval to a CIA plan to arm and train a group of Cuban refugees to overthrow the Castro government. The invasion (known as the Bay of Pigs Invasion) took place on 14 April 1961, during the term of President John F. Kennedy. About 1,400 Cuban exiles disembarked at the Bay of Pigs, but failed in their attempt to overthrow Castro. 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 (October 1962) almost sparked . By 1963, Cuba was moving towards a full-fledged Communist system modeled on the USSR.