M.A.I.N WWI Crossword Puzzle

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Across
  1. 2. When a stronger country takes over a weaker one to increase their power & wealth
  2. 4. An official agreement between 2 or more countries to help each other in times of war
  3. 7. Disease WWI soldiers got from standing in water for too long
  4. 9. These pests were found in the trenches & could get up to the size of cats!
  5. 10. Big machinery that could move across No Man's Land
  6. 11. This country joined late in WWI (1917)
  7. 12. WWI was mainly fought using this type of warfare
  8. 13. Developed by the Germans that causes choking, burns and blindness
  9. 14. The spark for WWI
  10. 15. Gas-filled balloons introduced by Germans
  11. 17. The gang Gavrilo Princip was part of
  12. 18. Nickname for Submarines in WWI
  13. 20. This country backed up Austria-Hungary as an ally after they declared war
  14. 21. Disorder many surviving soldiers of WWI had that included blank stares and panic attacks
Down
  1. 1. Country blamed for Archduke Ferdinand's death
  2. 3. The constant cycle of countries building up their military
  3. 5. The idea that your country is the best in the world
  4. 6. The "Bad Guys" of WWI that went against Allied Powers
  5. 8. WWI Nickname
  6. 16. The area between 2 trenches
  7. 19. The Scramble for _______________: European countries rushed to colonize this area