Answer:
Woodrow Wilson, David Lloyd George, George Clemenceau, Vitorrio Orlando
Explanation:
The Treaty of Versailles ended WWI. The world leaders that participated were:
Woodrow Wilson - United States
David Lloyd George - United Kingdom
George Clemenceau - France
(AND)
Vitorrio Orlando - Italy
Keep in mind that President Wilson did NOT want to participate in the Treaty of Versailles because of how harshly it treated the Germans. Instead, he wanted to use his 14 points, which were shot down by Congress. America did NOT participate in the signing of the treaty itself either to my knowledge.
