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