Post-World War I refers to the period following the end of the First World War in 1918. This era was marked by significant political, social, and economic changes across Europe and beyond. The war resulted in the collapse of empires, such as the Austro-Hungarian Empire and the Ottoman Empire, leading to the creation of new nations and borders. The Treaty of Versailles, signed in 1919, imposed heavy reparations on Germany and aimed to prevent future conflicts. The aftermath of the war also saw widespread social upheaval and economic challenges, including inflation and unemployment. The League of Nations was established in an attempt to promote peace and cooperation among countries. However, the unresolved issues and tensions from this period would eventually contribute to the outbreak of World War II in 1939.