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
Protestantism in Cuba walls keeping Protestants out of Cuba were broken down. Many Protestants began to make their home in Cuba. Several more Protestants influenced the culture and society by coming to trade or vacation on the island. Even with the opening of trade, tensions remained strong between Catholics and Protestants in Cuba throughout the early days of the colony. Many of the Protestant churches in Cuba have ties to the United States through various missionary activity. The Baptist Convention of Cuba is an influential Protestant group that was begun by a Cuban exile who was associated with the American Southern Baptist Convention.