World War I Weapons

12345678910111213
Across
  1. 3. Used by all soldiers in World War One
  2. 5. This colorless gas is deadly
  3. 7. These weapons were used by submarines
  4. 8. This American liner was blown up
  5. 9. Tanks were first used at this battle
  6. 11. is also known as Blimp
  7. 13. fight between two planes
Down
  1. 1. needed 12 men to aim, load and fire
  2. 2. large metal-armored battleships
  3. 4. This gas was first used at Ypres in 1915
  4. 6. the area between trenches
  5. 10. gun needed 4 - 6 men to work it
  6. 12. Name of the first tank little ______