A brief summary of the Bay of Pigs invasion from the Columbia encyclopedia is reproduced below: http://www.bartleby.com/65/ba/BayPigsI.html
On Apr. 17, 1961, an armed force of about 1,500 Cuban exiles landed in the Bahia de Cochinos (Bay of Pigs) on the south coast of Cuba. Trained since May, 1960, in Guatemala by members of the Central Intelligence Agency (CIA) with the approval of the Eisenhower administration, and supplied with arms by the US government, the rebels intended to foment an insurrection in Cuba and overthrow the Communist regime of Fidel Castro. The Cuban army easily defeated the rebels and by Apr. 20, most were either killed or captured. The invasion provoked anti-US demonstrations in Latin America and Europe and further embittered US-Cuban relations. Poorly planned and executed, the invasion subjected President Kennedy to severe criticism at home. Cuban exile leader Jose Miro Cardona, president of the US-based National Revolutionary Council, blamed the failure on the CIA and the refusal of Kennedy to authorize air support for the invasion. In Dec., 1962, Castro released 1,113 captured rebels in exchange for $53 million in food and medicine raised by private donations in the United States.