The Treaty of Versailles, signed in 1919, held immense significance in shaping post-war politics, marking the formal end of World War I. It imposed heavy reparations and territorial losses on Germany, which fostered widespread resentment and economic hardship, contributing to the rise of extremist movements, including Nazism. Additionally, the treaty established the League of Nations, aiming to promote global cooperation and prevent future conflicts. However, the treaty's punitive measures ultimately failed to secure lasting peace and became a catalyst for World War II, highlighting the challenges of reconciling national interests with the desire for collective security.