Emma and Elizabeth WWI Crossword Puzzle

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Across
  1. 2. became a hero for saving many soldiers lives from gas attacks
  2. 4. The result of their feet being in the wet conditions
  3. 7. a promise to protect other countries
  4. 10. german U boats that carried supplies across the sea
  5. 11. loyalty and devotion to a nation
  6. 13. enlarging territory
Down
  1. 1. it had miles of this in no mans land
  2. 3. could fire 500-600 rounds per minute
  3. 4. armed vehicles to cross no mans land
  4. 5. using military strength to solve problems
  5. 6. required soldiers to get closer to enemy lines
  6. 8. led to the invention of gas masks to keep soldiers safe
  7. 9. used for spying and fighting in the air
  8. 12. There were a ton of these in the trenches