Final answer:
Fidel Castro, along with his brother Raul Castro and Che Guevara, led the Communist guerrilla forces against Batista's forces during the Cuban Revolution.
Step-by-step explanation:
The Communist guerrilla forces that led the opposition against Batista's forces during the Cuban Revolution were led by Fidel Castro, along with his brother Raul Castro and other revolutionaries such as Che Guevara. They organized and trained in Mexico before returning to Cuba to start the revolution. Through their efforts and the support of the Cuban people, they successfully overthrew the US-backed Batista government.