World War I

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Across
  1. 2. When neither side gains any ground
  2. 4. My gun is bigger than your gun theory
  3. 5. American ship sunk by German U-boats
  4. 7. Invention used by U-boats to see
  5. 8. Type of warfare that used machine guns and resulted in little to no movement
  6. 13. Germany, Aust-Hung, Italy
  7. 15. Telegram sent to Mexico that the US intercepted
  8. 16. Aircrafts used which used a machine gun
  9. 18. Person who shot Ferdinand which arguably starts the war
  10. 19. ”Dude got shot”
Down
  1. 1. Weapon used that suffocated people to death
  2. 3. France, Russia, England
  3. 6. President of US during this time
  4. 9. German leader is called this
  5. 10. Weapon used mainly in trench warfare
  6. 11. Armored weapon devised to break the stalemate
  7. 12. Invention that helps move troops
  8. 14. German plan to surround France at the start of war
  9. 15. Giant airships like the Hindenburg
  10. 17. Troops who were quick and moved around alot