How did the United States’ decision to join the Allies affect World War I? The decision played a minor role because the United States was unable to mobilize troops fast enough to defeat Germany.
The decision played a major role because the United States supplied thousands of men and supplies to aid in the Allied victory.
The decision played a minor role because the United States sent most of its resources to protect its border with Mexico.
The decision played a major role because the United States supplied millions of dollars and political pressure to aid in the Allied victory.