U.S.–Austrian Peace Treaty (1921)
The Treaty of Vienna of 1921 was a peace treaty signed by the United States and Austria in the Austrian capital city of Vienna on 24 August 1921 and got effective on 8 November 1921 regarding Austria as a member of the Central Powers in World War I and effectively ending the state of war between two countries. This happened because the United States Senate refused to ratify the Treaty of Saint-Germain-en-Laye. The signatories were American Arthur Hugh Frazier and Austrian Johannes Schober.