Granma is the yacht that was used to transport 82 fighters of the Cuban Revolution from Mexico to Cuba in November 1956 for the purpose of overthrowing the regime of Fulgencio Batista. The 60-foot (18 m) diesel-powered cabin cruiser was built in 1943 and designed to accommodate 12 people. "Granma", in English, is an affectionate term for a grandmother; the yacht is said to have been named for the original owner's grandmother.
The yacht was purchased on 10 October 1956 for MX$50,000 (US$15,000) from the United States–based Schuylkill Products Company, Inc., by a Mexican citizen—said to be Mexico City gun dealer Antonio "The Friend" del Conde—secretly representing Fidel Castro. Castro's 26th of July Movement had attempted to purchase a Catalina flying boat maritime aircraft, or a US naval crash rescue boat for the purpose of crossing the Gulf of Mexico to Cuba, but their efforts had been thwarted by lack of funds. The money to purchase Granma had been raised in the US state of Florida by former President of Cuba Carlos Prío Socarrás and Teresa Casuso Morín.
Shortly after midnight on 25 November 1956 in the Mexican port of Tuxpan, Veracruz, Granma was surreptitiously boarded by 82 members of the 26th of July movement including their leader, Fidel Castro, his brother, Raúl Castro, Che Guevara, and Camilo Cienfuegos. The group—who later came to be known collectively as los expedicionarios del yate Granma (the Granma yacht expeditioners)—then set out from Tuxpan at 2 a.m. After a series of vicissitudes and misadventures, including diminishing supplies, sea-sickness, and the near-foundering of their heavily laden and leaking craft, they disembarked on 2 December on the Playa Las Coloradas, municipality of Niquero, in modern Granma Province (after the vessel), formerly part of the larger Oriente Province. Granma was piloted by Norberto Collado Abreu, a Cuban Navy veteran and ally of Castro. The location was chosen to emulate the voyage of national hero José Martí, who had landed in the same region 61 years earlier during the wars of independence from Spanish colonial rule.