he dictator that overthrew Batista was FIDEL CASTRO.
On January 1, 1959, the Rebel Army forces led by Fidel Castro entered victorious in Santiago de Cuba and the dictator Fulgencio Batista flees to the United States.
The revolution put an end to the dictatorship of Fulgencio Batista, who had come to power on March 10, 1952.
As of that moment the power was definitively in the hands of the revolutionary forces. Historically, it is taken as the date of the triumph of the Revolution on January 1, 1959.