Answer:In the years after World War II, the United States was guided generally by containment the policy of keeping communism from spreading beyond the countries already under its influence. The policy applied to a world divided by the Cold War, a struggle between the United States and the Soviet Union.
It is the reasoning why the American colonies are leaving the British Empire. It is important because it was the basis for starting the American Revolution and attempting to become a separate nation out of British control.
