The treaty signed at the end of World War I that aimed to prevent future conflicts yet led to greater tensions was the Treaty of Versailles. Signed in 1919, it imposed harsh reparations and territorial losses on Germany, which fostered resentment among the German population. The treaty's punitive measures failed to stabilize Europe and instead contributed to the rise of extremist movements, setting the stage for World War II. It aimed to create lasting peace but instead became a symbol of failed diplomacy, highlighting the difficulties in reconciling national interests post-conflict.