WW1

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Across
  1. 2. length of the war
  2. 6. secret diplomatic communication from German foreign office
  3. 8. world organization to keep the peace
  4. 9. over 400 miles
  5. 12. president during WW1
  6. 13. poisonous gas
Down
  1. 1. US joined the Allied Powers
  2. 3. german U boat
  3. 4. member of US Army or Marines
  4. 5. Germany, Austria-Hungary and Ottoman Empire
  5. 7. principles for peace
  6. 10. Great Britain, France, Russia, Italy and Japan
  7. 11. able to vote after war