Foreign relations of Cuba needed oil. Relations between the countries deteriorated rapidly. In April 1961, following air attacks preparing for the Bay of Pigs Invasion by CIA-trained Cuban exiles, prime minister Fidel Castro declared Cuba to be a socialist republic, and moved quickly to develop the growing relations between Cuba and the Soviet Union. In 1962, Cuba was expelled from the Organization of American States. Shortly afterwards, many nations throughout Latin America broke ties with Cuba, leaving the island increasingly isolated in the region and dependent on Soviet trade and cooperation. Following the establishment of diplomatic ties, and after the Cuban missile crisis in
Workers' Central Union of Cuba Workers' Central Union of Cuba The Workers Central Union of Cuba (CTC) is the trade union federation in Cuba. It originated as the "Confederación de Trabajadores de Cuba" (Confederation of Cuban Workers) in 1939 and changed its name to the Central Union of Cuban Workers in 1961. The CTC unites 19 sectoral unions, organised in more than 81,000 workplaces, with elected municipal, provincial and national committees for each union, with all Cuban workers belonging to this trade union federation. The CTC also has a weekly newspaper, "Trabajadores". In the 1930s, the Cuban labor movement declined after an unsuccessful general strike