What prevented the soviet union from invading western europe in the cold war?

The creation of the North Atlantic Treaty Organization (NATO)prevented the Soviet Union from invading Western Europe. Shortly after World War II, the United States formed an alliance with several Western European countries including Great Britain and France. This alliance was known as NATO and ensured that if any of the nations in this group were attacked, the other nations would help them. So, the Soviet Union did not invade Western Europe because they would be fighting several countries if they did so.

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