Americas role in ww1 and World War 2?

In World War I, America's role was initially one of neutrality, but it entered the conflict in 1917, providing crucial military support and resources to the Allies, which helped turn the tide against the Central Powers. In World War II, the U.S. joined the fight after the attack on Pearl Harbor in 1941, playing a pivotal role in both the European and Pacific theaters through large-scale military operations, economic support, and strategic alliances. The U.S. emerged as a global superpower post-war, significantly influencing the establishment of international institutions and shaping the post-war order.