The outcome of the U.S. involvement in World War I was a decisive victory for the Allies, with significant contributions in terms of troops and resources. American forces played a crucial role in several key battles, helping to turn the tide against the Central Powers. The U.S. emerged with greater international influence and a prominent role in post-war diplomacy. The war also prompted domestic changes, such as the Great Migration and shifts in women's roles in the workforce. However, the Treaty of Versailles and the ensuing peace discussions raised questions about America's future international engagements and isolationist tendencies.