1. The creation of a League of Nations. The United States was strongly in favor of creating a League of Nations to promote peace and prevent future wars. However, many European countries were skeptical of the idea, fearing that it would infringe on their sovereignty.
2. The disposition of Germany. The United States wanted to take a lenient approach to Germany, fearing that harsh treatment would lead to future revanchism. However, many European countries, particularly France, wanted to punish Germany severely for its role in the war.
3. The fate of the Ottoman Empire. The United States wanted to see the Ottoman Empire partitioned and its territories divided among the Allied Powers. However, many European countries, particularly France and Britain, wanted to maintain the Ottoman Empire as a buffer against Russian expansion.
4. The issue of reparations. The United States was opposed to imposing large reparations on Germany, arguing that this would only hurt the German economy and make it more difficult for the country to recover from the war. However, many European countries, particularly France, wanted to impose heavy reparations on Germany to punish it for the war and to ensure that it would not be able to wage war again.
5. The question of war guilt. The United States did not believe that Germany should be held solely responsible for the war. However, many European countries, particularly France, wanted to place the blame for the war squarely on Germany and to use this as justification for harsh treatment of the country.
These disagreements led to a number of tense moments at the Paris Peace Conference and made it difficult to reach agreement on a final peace treaty.