Why were the soviets proud of sputnik 1

When the Soviets began using Sputnik in their propaganda, they emphasized pride in the achievement of Soviet technology, arguing that it demonstrated the Soviets' superiority over the West.

Explanation:

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The Soviet Government was proud of the launch because they were the first to send anything into space which could be used. The Soviet Government would later send a dog and human into space but the Sputnik 1 itself had stroked terror into the Americans since they considered that it could be used for spying on the American military action and bases.