WW1 Technology

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Across
  1. 3. Had "Dogfighting" aerial battles and eventually bombed trenches from the sky
  2. 5. Spewed 400/500 round per minute
  3. 6. Grenades and cannons fit into this category
  4. 8. Demolished enemies
  5. 9. A weapon that sprays out burning fuel
Down
  1. 1. Lungs were filled with fluid and you drowned from the inside out
  2. 2. Metal cable with sharp spikes used for trench defense
  3. 4. Went underwater ; were also called German U-Boats
  4. 7. Created chemical burns on contact
  5. 8. Long ditch dug in the ground