Final answer:
The United States' main contributions to the Allied victory in World War I included battlefield victories, foodstuffs, oil, munitions, and financial credit. Except, they did not have significant battlefield victories.
Step-by-step explanation:
The United States' main contributions to the Allied victory in World War I included battlefield victories, foodstuffs, oil, munitions, and financial credit. However, the one exception among these contributions was battlefield victories. The entrance of the United States in the war provided food, oil, munitions, and financial credit to the Allies, which greatly supported their efforts. The US had a large industrial capacity and millions of fresh troops, which helped turn the tide of the war and push Germany to the brink of collapse. Although the US did not have significant battlefield victories, its contributions in other areas were instrumental in achieving the Allied victory.