The Treaty of Versailles ended WWI. There was no single peace treaty ending WWII, such as the Treaty of Paris which ended the French and Indian War, Revolutionary War, Seven Years War, Crimean War, and the Spanish-American War. The United States did not formally end hostilities with Germany until October 19, 1951. The United States signed the Treaty of Peace with Japan in 1951. Russia and Japan still have not signed a peace treaty ending WWII hostilities.