Which treaty formally ended World War I between Germany and the Allies?

The Treaty of Versailles formally ended the state of war between Germany and the Allied powers after World War I.

The treaty was signed on 28 June 1919 in the Hall of Mirrors at the Palace of Versailles, exactly five years after the assassination of Archduke Franz Ferdinand. It required Germany to accept responsibility for the war, make reparations, reduce its armed forces, and surrender territory.

The treaty also created the League of Nations, an international organization intended to prevent future wars. The United States signed the peace settlement at the Paris Peace Conference but did not ratify the Treaty of Versailles, and it never joined the League.

The treaty was one of several postwar agreements. Treaties with Austria, Hungary, Bulgaria, and the Ottoman Empire addressed the other defeated Central Powers, so Versailles did not by itself settle every consequence of the war.