The Marshall plan was largely an economic stimulus package not a military strategy. Regarding military strategy the current US military policy objectives (wikip

The Marshall plan was largely an economic stimulus package not a military strategy. Regarding military strategy the current US military policy objectives (wikipedia) are: to (1) assure allies and friends; (2) dissuade future military competition, (3) deter threats and coercion against U.S. interests, and (4) if deterrence fails, decisively defeat any adversary. Now you could argue that these objectives are meant ensure global piece, but then you need to show that. In particular do you need to show how US starting several wars (including the ones that were not called wars for political reasons), largely based on economic reasons, does maintain global peace.