Castro's poorly armed group attempted to seize the country's second-largest military garrison and spark a popular uprising against dictator Fulgencio Batista. The assault collapsed within hours, with dozens of rebels killed and Castro captured. His trial speech, later published as "History Will Absolve Me," became a founding manifesto of the Cuban Revolution, which triumphed less than six years later.
Castro named his movement the "26th of July Movement" after this very date, memorializing a military disaster as the origin story of what would become a communist revolution. Many captured rebels were tortured and executed by Batista's forces in the attack's aftermath, atrocities that generated sympathy and outrage across Cuba.
Castro himself was captured days later hiding in the countryside, reportedly saved from summary execution by a sympathetic army officer who recognized him. At his trial, Castro conducted his own defense, delivering a marathon speech blending legal argument with revolutionary rhetoric, later smuggled out of prison and printed clandestinely.
Sentenced to fifteen years, Castro served less than two before an amnesty freed him in 1955. He left for Mexico, met Che Guevara, and returned in 1956 aboard the yacht Granma to resume the fight—this time successfully.
Key people: Fidel Castro, Fulgencio Batista