Historic Moncada Barracks, now a school.

We toured the museum portion of this historic site, with its collection of photographs and guerrilla attire. The attack by Castro on these barracks in 1953 was a failure; there were many deaths on both sides, including execution of Castro's followers after capture. Fidel and Raul and other participants were later apprehended, tried, and sent to prison.  The below material is from Wikipedia, and its accuracy is not verifiable.

Castro was captured, tried and sentenced to 15 years in prison. However, he was released by the Batista government in 1956, when amnesty was given to many political prisoners, including the ones that assaulted the Moncada barracks. Castro subsequently went into exile in Mexico where he met Ernesto "Che" Guevara. While in Mexico, he organized the 26th of July Movement with the goal of overthrowing Batista. A group of 82 men sailed to Cuba on board the yacht Granma, landing in the eastern part of the island in December 1956. Despite a pre-landing rising in Santiago by Frank Pais and his followers of the urban pro-Castro movement, most of Castro's men were promptly killed, dispersed or taken prisoner by Batista's forces.

Castro managed to escape to the Sierra Maestra mountains with about 12-17 effectives, aided by the urban and rural opposition, including Celia Sanchez and the bandits of Cresencio Perez's family, he began a guerrilla campaign against the regime. Castro's main forces supported by numerous poorly armed escopeteros, and with support from the well armed fighters of the Frank Pais urban organization who at times went to the mountains the rebel army grew more and more effective. The country was soon driven to chaos conducted in the cities by diverse groups of the anti-Batista resistance and notably a bloodily crushed rising by the Batista Navy personnel in Cienfuegos. At the same time, rival guerrilla groups in the Escambray Mountains also grew more and more effective. Castro attempted to arrange a general strike in 1958, but did not get support from Communists or labor unions.^{[79][page needed]}

United States imposed trade restrictions on the Batista administration and sent an envoy which attempted to persuade Batista to leave the country voluntarily.^[68] The middle class was dissatisfied with the unemployment and wanted to restore the 1940 constitution. Batista fled on 1 January 1959.

Castro took over. Within months of taking control, Castro moved to consolidate power by brutally marginalizing other resistance groups and figures and imprisoning and executing opponents and former supporters. As the revolution became more radical and continued its persecution of those who did not agree with its direction, hundreds of thousands of Cubans fled the island.

The Moncada Barracks was a military barracks in Santiago de Cuba, named after General Guillermón Moncada, a hero of the War of Independence. On July 26, 1953, the barracks was the site of an armed attack by a small group of revolutionaries led by Fidel Castro. This armed attack is widely accepted as the beginning of the Cuban Revolution. The date on which the attack took place, July 26, was adopted by Castro as the name for his revolutionary movement (Movimiento 26 Julio or M 26-7) which eventually toppled the dictatorship of Fulgencio Batista in 1959.  Source: Wikipedia.