<P> Washington's increasing economic embargo led Cuba to hurriedly seek new markets to avert economic disaster . Castro asked for help from the Soviets and in response Khrushchev approved the temporary purchase of Cuban sugar in exchange for Soviet fuel . This deal was to play a part in sustaining the Cuban economy for many years to come . Following the failed Bay of Pigs Invasion of 1961, Fidel Castro announced publicly that Cuba was to become a socialist republic . Khrushchev sent congratulations to Castro for repelling the invasion, but privately believed the Americans would soon bring the weight of their regular army to bear . The defense of Cuba became a matter of prestige for the Soviet Union, and Khruschev believed that the U.S. would block all access to the island whether by sea or air . </P> <P> Khrushchev agreed on a deployment plan in May 1962 chiefly in response to NATO positioning their nuclear missiles in Turkey in 1958, and by late July over sixty Soviet ships were on route to Cuba, some of them already carrying military material . A U.S. U-2 flight on the morning of October 14 photographed a series of SAM (surface - to - air missile) sites being constructed . In a televised address on October 22, U.S. President John F. Kennedy announced the discovery of the installations and proclaimed that any nuclear missile attack from Cuba would be regarded as an attack by the Soviet Union and would be responded to accordingly . Khrushchev sent letters to Kennedy on October 23 and 24 claiming the deterrent nature of the missiles in Cuba and the peaceful intentions of the Soviet Union . On October 26, the Soviets offered to withdraw the missiles in return for a U.S. guarantee not to invade Cuba or support any invasion and to remove all missiles set in southern Italy and in Turkey . This deal was accepted and the crisis abated . </P> <P> The missile crisis had a significant impact on the countries involved . While it led to a thaw in U.S. - Soviet relations, it further strained Cuban - Soviet relations . Castro was not consulted throughout the Kennedy - Khrushchev negotiations and was angered by the unilateral Soviet withdrawal of the missiles and bombers . The People's Republic of China likewise expressed concern about the outcome . </P> <P> In 1962 the Soviets created a SIGINT facility in Lourdes, just south of Havana . The SIGINT facility at Lourdes was among the most significant intelligence collection capabilities targeting the United States . It allowed the Soviets to monitor all U.S. military and civilian geosynchronous communications satellites . </P>

How did the crisis affect us relations with cuba and the soviet union
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