Treaty of Versailles: The Treaty of Versailles was signed in 1919 after World War I and imposed harsh conditions on Germany. It contributed to political tensions and economic hardships during the inter-war years.
Great Depression: The Great Depression was a severe worldwide economic downturn that began in 1929 and lasted throughout the inter-war years. It resulted in widespread unemployment, poverty, and financial crises.
League of Nations: The League of Nations was an international organization established after World War I to promote peace and prevent future conflicts. It played a significant role during the inter-war years but ultimately failed to prevent World War II.