World War I Crossword Puzzle

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Across
  1. 5. ___________ warfare; Use of toxic chemical compounds on the battlefield
  2. 6. ___________ warfare; widespread use of machines and vehicles in the war
  3. 9. German strategy for defeating France first and then Russia
  4. 13. One nation taking over more territory
  5. 15. Payments for injury or war damages
  6. 16. Germany, Austria-Hungary, Ottoman Empire
  7. 19. German submarine
  8. 20. Devotion to one's nation
  9. 21. Secret Serbian terrorist group
  10. 22. Ruler of Germany during WWI
  11. 24. Battle featuring American Doughboys
Down
  1. 1. 1915 ship sunk by Germany
  2. 2. American general of the AEF
  3. 3. Assassinated Franz Ferdinand
  4. 4. World organization proposed by Wilson
  5. 7. Wilson's plan for world peace after WWI
  6. 8. Name of treaty to end the war
  7. 10. Great Britain, France, Russia
  8. 11. Russian Czar during WWI
  9. 12. Intercepted telegram from Germany to Mexico asking Mexico to attack the US
  10. 14. Leader of the Russian Revolution
  11. 17. Aggressively building up a nation's military
  12. 18. Heavily armored battleship
  13. 22. President of the US during WWI
  14. 23. Avoiding involvement in world affairs