US History Puzzles: World War I

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Across
  1. 3. This country withdrew from the war after suffering an internal revolution
  2. 4. England, France, Russia, and Italy were know as the ___
  3. 6. WWI was called the "war to make the world safe for ___"
  4. 7. Commander of the American Expeditionary Force (3 words)
  5. 8. The leader of Germany who surrendered on November 11, 1918 (3 words)
  6. 11. The US ____ rejected the Treaty of Versailles
  7. 14. Germany, Austria,-Hungary, Turkey, and Bulgaria were known as the __ __
  8. 15. President Wilson's plans for a __ _ __ were included in the peace treaty
Down
  1. 1. This treaty officially ended the WWI in 1919
  2. 2. One of the battles in northern France that Americans participated in
  3. 5. Austrian Archduke who was assassinated in 1914 (2 words)
  4. 9. President who urged Americans to be neutral (2 words)
  5. 10. A stalemate resulted when these were dug across northern France
  6. 12. Germans conducted ____ warfare against British ships
  7. 13. One of the weapons used for the first time in WWI