The establishment of the United States as a global power is closely associated with World War II. The war solidified the U.S. position on the world stage, showcasing its military and industrial strength. Post-war, the U.S. emerged not only as a leader in the Allied victory but also as a key architect of a new international order, participating in the founding of institutions like the United Nations and the International Monetary Fund. The Marshall Plan further established American influence in Europe by aiding reconstruction. Consequently, the U.S. became a superpower, engaged in global geopolitics, and laid the foundation for its pivotal role during the Cold War.