Question: What was the name of the guerilla force that eventually challenged the rule of the Cuban dictator who was U.S.-backed from 1952 to 1959?
Sentence (from "Fulgencio Batista"): Fulgencio Batista y Zaldívar (] ; born Rubén Zaldívar; January 16, 1901 – August 6, 1973) was the elected President of Cuba from 1940 to 1944, and U.S.-backed dictator from 1952 to 1959, before being overthrown during the Cuban Revolution.
Relevant evidence: Yes