Which key clause of the Treaty of Versailles assigned Germany sole blame for World War I?

💡 Explanation:

The War Guilt Clause, formally Article 231 of the Treaty of Versailles, forced Germany to accept full responsibility for the damage caused by World War I. This provision, along with the subsequent demand for massive war reparations, created deep resentment and humiliation within Germany, which historians often cite as a factor contributing to the rise of Adolf Hitler and the eventual outbreak of World War II.