Chapter 22 elucidates how a consolidation of the truncated order of Versailles was first hampered by the divergent longer-term outlooks of the victors and later decisively affected by Wilson’s defeat in the battle over the ratification of the Treaty of Versailles and the Covenant of the League of Nations in the American Senate. It then analyses systematically, and in a global context, how in the aftermath of the American withdrawal from it the crisis of the Versailles system escalated into a full-blown conflict in postwar Europe, which culminated in the transformative Franco-German Ruhr crisis of 1923.