The first revolution against Spain was nearly over. Riots in Havana (1898) gave the Americans the evidence they had been waiting for and they sent in the USS Maine which blew up, killing 258 people. The US accused the Spanish of sabotage and so began the Spanish-American war. Cubans believe the US blew up their own ship and they were close to winning independence anyway. The Spanish surrendered and Cuba became independent with the US promising they were not intending to exercise any political power there, they were just helping to free the country from the colonial grip of Spain.
Quotes from the museum:
'The underground fight in the cities was growing day after day as the moment of the definitive victory was approaching. Furious because of the defeat and impotent given the bravery of the revolutionaries, the henchmen of the tyranny increased their criminality.'
After winning power Castro nationalised swathes of businesses owned by US companies and used the money to reform education, healthcare etc.
Every single outbreak of disease, whether in plant, animal or human is blamed on the CIA with a date, number of deaths and a clear accusation (but no evidence) against the CIA.
Many in the city are proud of the revolution with workplace signs, statues and posters praising revolution everywhere.