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In response, the Soviet Union prposed the Zhdanov Doctrine, which denounced Us imperialism in Western Europe and offered assistanced to countries that would not submit to it
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The rupture between the capitalist bloc and the communist bloc began in 1947, since that moment this time started
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Us president Harry Truman proclaimed the so-called doctrine of contaiment also known as the Truman Doctrine, which denounced the creation, under preassure, of comunist regimes in Central and Eastern Europe, and offered help to the people threatened by the spread of communism
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This stage began in 1956 marked by the desire for dialogue between the two blocs. It was fovoured by the increase of nuclear power in the Soviet Union and the attitude of the new Us leaders- John F. Kennedy and Richard Nixon- and Soviet leaders Nikita Khrushchev and Leonid Brezhnev
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During these years, the Soviet Union tried to achieve military supermacy. It deployed SS-20 missiles equipped with nuclear warheads, which directly threatened Western Europe, and it also increased its foreign interventions: the invasion of Afghanistan in 1979, the African conflicts
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Under President Ronald Reagan (1981-1989), increased military sprending and undertook the Strategic Defense Initiative also known as Star Wars in 1983, and intervened in `low-intensity conflicts´ in the Thrid World
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Between 1977 and 1985 the Cold War again grew more tense, due to the increase in the arms race, especially focused on nuclear weapons
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In 1985 a change in trend began. In the Soviet Union, Mikhail Gorbachev began to ease tensions, intensified dialogue with the United States, declared Soviet unilateral disarmament, withdrew from Afghanistan and the African conflicts, and granted greater autonomy to the people´s republics. Meanwhile, in the United States, the increase in public deficit hampered the mainteance of the costly nuclear arms race.
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This event and the dissapereance of the Soviet Union, the cold war ended and a new international orden began, in wich the United States remainded as the only world superpower
