What events led to the failed Bay of Pigs invasion?

This happened in April 17 1961 the Cuban exiles launched and became a botched invasion in the bay of pigs

in April 17, 1961, 1400 Cuban exiles launched and became a botched invasion in the Bay of Pigs on the south coast of Cuba, 1959, Fidel Castro came to power in an armed revolt and it overthrew Cuban dictator Fulgencio Batista.