USA trade intrests in the Mediterranean and the Atlantic were severely affected, and any effort to secure those intrests meant war. In addition, after the war, the world became polarised and the Soviets who were communists were aggressively expanding around the globe, which implied that American system of free trade and democracy was being threatened.
Https://saylordotorg.github.io/text_world-regional-geography-people-places-and-globalization/s11-06-...
Thats what i think you should look at ^
