Fidel Castro, who was a young budding lawyer from a well to do family in Cuba, decided to run for a seat in the Chamber of Representatives. He was with the Partido Ortodoxo party and also worked against the Batista’s government for the reason that the president had tried to suppress the electoral process. However, the petition was not acted upon by the courts.

It was July 26, 1953 when Fidel Castro led a memorable attack on the barracks of Moncada, which was near Santiago de Cuba. However, Fidel Castro failed in his attempt and was put into prison for two years until 1955. Later on, he was released when many of the poisoned political leaders were given an official pardon including the ones that attacked the Moncada barracks.

Fidel Castro subsequently went into exile in Mexico. In Mexico, he was trying desperately to wage a war against the rule and succeeded in organizing a movement on July 26 with the aim of overthrowing the Batista government. A group of over 80 men sailed to Cuba on board the yacht Gramma, which landed on 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 killed, dispersed and taken prisoners in a surprise attack, murdered by Batista’s forces.

In the mean time, Fidel Castro managed to escape along with 10-12 solders to the Sierra Maestra helped by the rural and urban opposition, which included Celia Sanchez and the Cresencio Perez’s family bandits. They together began a guerrilla campaign against Batista’s regime. Castro’s main forces was made up 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 steered to chaos conducted in the cities by diverse groups of the anti-Batista resistance and notably a bloody 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
Faced with a corrupt and inefficient military and more over discouraged by a U.S. Government embargo on weapons sales to Cuba and public indignation and revulsion at his brutality toward opponents, Batista left the country and fled on January 1, 1959. Within months of taking control, Castro moved to merge power by suppressing and convincing the other smaller resistance groups and figures and imprisoning or executing opponents and former supporters. As the revolution became more radical, many hundreds of thousands of Cubans fled the island.

Later In July 1961, a merger was formed in the name of Integrated Revolutionary Organizations or ORI. It consisted of Fidel Castro’s 26th of July Revolutionary Movement, the People’s Socialist Party (the old Communist Party) led by Blas Roca and the Revolutionary Directory March 13th led by Faure Chomón. This party became the United Party of the Cuban Socialist Revolution, which is the Communist Party of Cuba.