What specifically was the United States' contribution to WWI once the US entered the war? In your opinion, how significant was the US' role in ending the war?

How did the US help in ww1?

The United States had 4,355,000 military personnel involved in World War I. The U.S. Navy played a major role in helping to blockade Germany, keeping out supplies, and hurting Germany economically. The U.S. forces that were sent to Europe during World War 1 were called the American Expeditionary Forces (AEF).

definitely a for sure. ill see and update if i get the answer