Which major event was catalyzed by the U.S. entering World War I?

The signing of the Treaty of Versailles was a direct consequence of the U.S. entering World War I. When the United States joined the war in 1917, it significantly bolstered the Allied forces, contributing to the eventual defeat of the Central Powers. President Woodrow Wilson's involvement in the post-war negotiations led to the drafting of the Treaty of Versailles in 1919. This treaty formally ended the state of war between Germany and the Allied Powers and included various provisions aimed at establishing a framework for lasting peace, including the establishment of the League of Nations.

In contrast, the other options do not have a direct causal relationship with the U.S. entering World War I. The Great Depression occurred much later, in the 1930s, stemming from a variety of economic factors unrelated to the war. The Industrial Revolution preceded World War I, having begun in the late 18th century and continuing into the 19th century, while the Civil Rights Movement gained momentum in the mid-20th century, significantly after the war had ended.