Trench

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Across
  1. 5. For your arms
  2. 7. Easy access to ammo
  3. 8. To make oneself taller
  4. 9. To stall for time
Down
  1. 1. Resting and protection
  2. 2. Flooring
  3. 3. "Gas attack!"
  4. 4. Protecting the trenches
  5. 6. The front