What is the name of the treaty that called for an immediate evacuation of German troops from Belgium , France , and Luxembourg within fifteen days and established that Allied forces would occupy the Rhineland ?
The Treaty of Versailles also specified the de-militarization of the entire area to provide a buffer between Germany on one side and France , Belgium and Luxembourg ( and to a lesser extent , the Netherlands ) on the other side , which meant that no German forces were allowed there after the Allied forces had withdrawn .