Which nation rejected the treaty of versailles, negotiating its own peace agreement with germany in 1921?

The United States rejected the Treaty of Versailles and negotiated its own peace agreement or agreement to end the war with Germany in 1921. The Senate would not vote to pass the Treaty of Versailles and instead sought to create a treaty or agreement solely based upon American terms. 

Protecting and assisting  u.s. citizens  living or traveling abroad; assisting u.s.  businesses  in the international marketplace; coordinating and providing support for international activities of other u.s. agencies (local, state, or federal government), official visits overseas and at home, and other diplomatic efforts.keeping the public informed about u.s. foreign policy and relations with other countries and providing feedback from the public to administration officials.providing  automobile registration  for non-diplomatic staff vehicles and the vehicles of diplomats of foreign countries having  diplomatic immunity  in the united states