WW1 crossword puzzle

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Across
  1. 3. was covered to stop soldiers and tanks
  2. 7. it was used to block toxic air to get into your lungs and melt them
  3. 8. a good boy
  4. 10. this was used to shelter soldiers behind it and also cover distances in no mans land
  5. 11. this thing was used to take out people, and the trenches with ease if they got across
  6. 12. this was a disease and people mainly got it from bacteria
Down
  1. 1. this was a sort of disease made by exposure to lots of wet mud or water
  2. 2. they would shoot you fast in daylight and this is the reason why they slept until night
  3. 4. this was used to do “dog fights”
  4. 5. they were used to fight in the water
  5. 6. it was used to cover the no mans land was easy to cut with clippers
  6. 9. this was used to keep soldiers in, it was mainly safe but it got muddy quickly and wet fast
  7. 13. this was a annoying thing that lived in the trenches that would eat rations