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However, it was France that had the most significant impact. France's constant desire for revenge alienated its allies and sparked radical political movements in Germany. The French understood that Germany was utterly drained by the war, losing almost half of its youngest adult male generation. Paris developed a decidedly defensive posture, seeking various ways to box in and humiliate Germany. France created alliances with many of the new Eastern European states, none of which would adequately function. France also produced a long line of defenses along the new Franco-German border. This Maginot Line proved to be less than up to the task in 1940, despite the substantial effort and investment.

[[File:Mass_demonstration_in_front_of_the_Reichstag_against_the_Treaty_of_Versailles.jpg|thumbnail|left||300px|Mass Demonstration against the Treaty of Versailles at the Reichstag in 1919.]]

Naturally, Germany was less than thrilled about their situation. By November 1918, nary a square mile was under Allied occupation, and the Kaiser's troops still occupied a substantial part of Belgium. German propaganda had been announcing for months that their soldiers were very close to victory through much of 1918. And in many ways, they had been. The shock of defeat, coupled with the harsh terms proposed, carved an indelible mark in the German psyche. This unexpected defeat led to the famous "stab in the back" theory utilized by Hitler. The sight of American, British, French, and Belgian occupying the Rhineland pierced the brief calm after the fighting ended.