The element of economic aid to countries destroyed by war is part of the policy of containment.
The policy of containment was a US foreign policy strategy during the Cold War aimed at preventing the spread of communism. It involved a variety of political, economic, and military measures, but the primary focus was on preventing the Soviet Union and its allies from expanding their influence into new territories. Economic aid, such as the Marshall Plan, was an important part of this strategy, as it was aimed at rebuilding war-torn European economies and strengthening their resistance to Soviet influence. Military intervention was also a component of the policy, but it was not limited to countries that were already communist.