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
History of Cuba the embargo did not extend to other countries, and Cuba traded with most European, Asian and Latin American countries and especially Canada. However, the United States later pressured other nations and American companies with foreign subsidiaries to restrict trade with Cuba. Also, the Helms–Burton Act of 1996 makes it very difficult for foreign companies doing business with Cuba to also do business in the United States, forcing them to choose between the two. In April 1961, less than four months into the Kennedy administration, the Central Intelligence Agency (CIA) executed a plan that had been developed under the Eisenhower administration.