Correct Answer:
C. 1919
The Treaty of Versailles was the most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers. It was signed on June 28, 1919, in Versailles, France, five years after the assassination of Archduke Franz Ferdinand, which directly led to the war.
- 1917: The United States entered World War I, and the Russian Revolution began.
- 1918: The armistice ending hostilities in World War I was signed on November 11.
- 1920: The League of Nations, established by the Treaty of Versailles, officially began its operations.