See: https://en.wikipedia.org/wiki/Bay_of_Pigs_Invasion

On this day (April 17) in 1961, a brigade of 1,400 Cuban exiles (Brigade 2506) landed at the “Bay of Pigs” (Playa Girón) on the south coast of Cuba with the goal of removing Fidel Castro from power and liberating Cuba from communism. According to Wikipedia, “67 Cuban exiles from Brigade 2506 were killed in action, additionally, 10 more were executed by firing squad, 10 lost their lives on the boat Celia trying to escape, 9 captured exiles in the sealed truck container on the way to Havana, 4 by accident, 2 in prison, and 4 American aviators, for a total of 106 deaths.” Alas, the question of why the Bay of Pigs invasion failed is debated to this day; see here, for example.