The available choices were to energeticly enforce it,
or to neglect it, as thay DID, permitting the 3rd Reich to re-arm for vengeance.
I believe Gavrilo Princip should share some of the blame
for WWII. He lit the fuse to the dynamite setting off WWI. Link takes you to the particulars at Wikipedia.
On 29 September 1918 the German Supreme Command informed Kaiser Wilhelm II and the Imperial Chancellor Count Georg von Hertling at army headquarters in Spa, Belgium that the military situation was hopeless. Generalquartiermeister Erich Ludendorff, probably fearing a breakthrough, claimed that he could not guarantee that the front would hold for another 24 hours and demanded a request be given to the Entente for an immediate ceasefire. In addition, he recommended the acceptance of the main demand of US President Woodrow Wilson (Fourteen Points) and put the Imperial Government on a democratic footing, hoping for more favourable peace terms. This enabled him to save the face of the Imperial Army and put the responsibility for the capitulation and its consequences squarely into the hands of the democratic parties and the parliament. As he said to officers of his staff on 1 October: "They now must lie on the bed that they've made us." Thus was born the "Stab-in-the-back" notion that the army had not failed, only the civilians.
American soldiers remained in Europe for some time as the demobilization continued, guarding against renewed hostilities. A newly activated Third Army crossed the French border into Germany on December 1, 1918, to occupy the region around Koblenz, between Luxembourg and the Rhine River. Eight U.S. divisions organized into three corps participated in the occupation of Germany. American occupation forces encountered no unusual difficulties with the populace, and their numbers were rapidly reduced after the Paris Peace Conference ended in May 1919. They numbered only about 15,000 by the beginning of 1920. After rejecting the Treaty of Versailles that resulted from the peace conference, the United States technically remained at war with Germany until a separate peace was signed in the summer of 1921. Occupying forces gradually withdrew after that, until the last thousand troops departed on January 24, 1923.