What American military resources tipped the balance of the war and led Germany's defeat?

American military resources that significantly tipped the balance of World War I in favor of the Allies included the deployment of fresh troops, known as the American Expeditionary Forces (AEF), which bolstered exhausted Allied forces. The U.S. also provided vital supplies, artillery, and advanced technology, such as tanks and aircraft, enhancing the Allies' operational capabilities. Additionally, the psychological impact of American involvement boosted Allied morale while demoralizing German forces, contributing to Germany's eventual defeat.