Why did the USSR want to create a communist buffer between them and Germany?

Although in 1945 the Communist world was limited to the Soviet Union, it rapidly spread to Central and Eastern Europe, forming a protective buffer zone for the USSR. Communist propaganda was greatly helped by the presence of the Soviet army in the countries that it had liberated in Central and Eastern Europe.

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b gas tractor

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c and negotiated lower prices for farm equipment and supplies

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d the grange

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c over 15,000 bankrupt businesses

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c people became more self-sufficient