The conflict that marked the beginning of the United States as a political and economic leader in the 20th century was World War I. This war, which took place from 1914 to 1918, had a significant impact on the United States' role in the world for several reasons:
1. Economic Growth: During World War I, the United States experienced a period of economic growth as it provided supplies, weapons, and other resources to the Allied powers. This boosted the country's industrial production and exports, setting the stage for its emergence as a global economic power.
2. Political Influence: The United States played a key role in shaping the outcome of World War I and participated in the post-war negotiations that led to the Treaty of Versailles. This treaty redefined the world map and established the League of Nations, in which the U.S. played a significant role in its early stages, showcasing its political influence on the global stage.
3. Rise to Power: The aftermath of World War I saw the United States emerging as one of the most powerful nations in the world, challenging traditional European dominance. This marked the beginning of the U.S. as a superpower and laid the foundation for its future leadership in international affairs.
Overall, World War I was a pivotal moment that propelled the United States into a position of political and economic leadership, shaping its role in the 20th century and beyond.
