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
CIA activities in Angola Teng referred to an early conversation between Nixon and Mao Zedong regarding Angola. "We hope that through the work of both sides we can achieve a better situation there. The relatively complex problem is the involvement of South Africa. And I believe you are aware of the feelings of the black Africans toward South Africa." No CIA personnel were present, but this is mentioned in the context of setting US policy toward Angola, where CIA did have covert operations. United States Secretary of State Henry Kissinger replied, "We are prepared to push South Africa as soon as an alternative military