The US played a crucial role in World War 1 by ultimately tipping the scales in favor of the Allied powers. Despite initially trying to remain neutral, US involvement in the war significantly shifted the balance of power and helped secure victory for the Allies. The US also played a key role in shaping the post-war landscape through the Treaty of Versailles and its participation in the League of Nations. Overall, the US emerged from World War 1 as a global superpower and a major player in international affairs.
