The warring powers met at Versailles to settle with the Germans and at other châteaux around Paris to settle with the rest. Peace congresses never meet in a world that is really at peace, for there is always an aftermath of local war, crises, and disturbances.
In 1918-1919 these were so numerous and acute that they conditioned the work of the peace congresses. In addition, throughout 1918-1919 an influenza epidemic more devastating than any disease since the Black Death swept across the world, taking 20 million lives and disrupting families and work everywhere.