Final answer:
The official end to World War I was marked by the signing of the Treaty of Versailles. The treaty placed the blame on Germany, imposed reparations, and led to the fall of the German empire. It also established the League of Nations.
Step-by-step explanation:
The official end to World War I was marked by the signing of the 1919 Treaty of Versailles. This treaty was signed between Germany and the Allied powers and it laid out the terms and conditions for peace. It placed the blame for the war on Germany, imposed reparations, and led to the fall of the German empire. The treaty also established the League of Nations, an international organization designed to prevent future conflicts.
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