what caused relations to deteriorate between the united states and the soviet union in 1979?\nthe united…

what caused relations to deteriorate between the united states and the soviet union in 1979?\nthe united states invaded afghanistan to prevent the spread of communism.\nthe soviet union invaded afghanistan to help its communist government.\nthe shah of iran entered the united states, which angered communists.\nthe united states fought the taliban, which angered communists.
Answer
Brief Explanations:
In 1979, the Soviet Union invaded Afghanistan to support the Communist - leaning government there. This action was met with strong condemnation from the United States and led to a significant deterioration in US - Soviet relations. The US saw it as an act of aggression and a threat to regional stability, which increased Cold - War tensions.
Answer:
The Soviet Union invaded Afghanistan to help its Communist government.