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The Berlin airlift was the first major international crisis of the Cold War.
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the korean war was a war between North and South Korea, in which a UN force led by the USA froght the North, which was assisted by the Soviet Union and China.
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the war was fought to prevent the communist takeover of south vietnam. This was part of a wider containment policy
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a pro-democracy movement which ended on 4 June 1989 with the shooting of several hundred or possibly thousands of civilians
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Its demolition officially began on 13 June 1990 and was completed in 1992.The barrier included guard towers placed along large concrete walls, which spaned over a wide area
