Treaty of Versailles 9 May 1919The Treaty of Versailles forced Germany to concede vast European territories and overseas colonies. Perhaps the most humiliating portion of the treaty for defeated Germany was Article 231, commonly known as the "War Guilt Clause," which forced the German nation to accept complete responsibility for initiating World War I. Germany was required to make enormous reparation payments. In addition, the German military was to be severely limited in size and armaments.