World war 1

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Across
  1. 3. Used to drop bombs
  2. 5. invented by Richard Fielder
  3. 6. Joined the war in 1917
  4. 7. Halt in fighting
  5. 9. Went from extreme Boredom to a lot of stress
  6. 10. Submarines U.S ships got damaged from these
  7. 12. Used to cross terrain and knock down trenches
  8. 13. France England Serbia Russia Italy U.S.
  9. 14. French Navy created these
Down
  1. 1. Germany Austria-Hungary Ottoman Empire
  2. 2. Was faster than battle ships
  3. 4. Ferdinand Assassinated to start the war
  4. 8. Germany army caught this disease at the end of war
  5. 11. Telegram A message from Arthur Zimmerman to the German ambassador
  6. 12. Warfare long trenches that faced each other