The United States' Central Intelligence Agency (CIA) made numerous unsuccessful attempts to assassinate Cuban leader Fidel Castro. There were also attempts by Cuban exiles, sometimes in cooperation with the CIA. The 1975 Church Committee claimed eight proven CIA assassination attempts between 1960 and 1965. In 1976, President Gerald Ford issued an Executive Order banning political assassinations. In 2006, Fabián Escalante, former chief of Cuba's intelligence, stated that there had been 634 assassination schemes or attempts. The last known plot to assassinate Castro was by Cuban exiles in 2000.

https://en.wikipedia.org/wiki/CIA_assassination_attempts_on_Fidel_Castro