The War Guilt Clause, also known as Article 231, was the part of the Treaty of Versailles that forced Germany to accept sole responsibility for causing World War I. This allowed the Allies to justify their heavy reparations demands on Germany. The Germans were not given a chance to veto this clause and were told the Allies would invade if they did not sign. More than any other provision, the War Guilt Clause reinforced the shame and anger felt in Germany, fueling opposition to the treaty and aiding the rise of Hitler.