⊰Xavier and Gavin's WWI crossword puzzle!!!!!!!!!⊱

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Across
  1. 1. Sent gear to help with WW1
  2. 4. what they hid in
  3. 7. Heavily armored vehicles used for harsh environments that use large ammo.
  4. 10. The Country that got split with Austria
  5. 11. Brought everyone together for 9 days before going back to war
  6. 12. short range weapon
  7. 13. What they used to take out others in trenches
  8. 14. What WW1 was called before WW2
  9. 15. The guy that got assassinated that caused WW1
Down
  1. 2. Now known as PTSD
  2. 3. Who was in most of the war; had to take blame of everything
  3. 5. What they used to "secretly" take out enemies
  4. 6. What the Germans sunk
  5. 8. What they used to not get infected by the mustard gas
  6. 9. The part of the battle field that most people never go to/survive.