WW1 Crossword Puzzle

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Across
  1. 5. Ally of Serbia
  2. 7. The battlefield between France and Germany
  3. 10. The Schlieffen plan was created in an attempt to prevent this
  4. 11. Helped set Germans entry into WW1
  5. 13. The first country in the Allied Powers
  6. 16. Joined the war due to Germany invading the neutral country
  7. 17. Made up of Germany, Austria-Hungary, and the Ottoman Empire
  8. 18. Known for mostly causing the start of the war
  9. 19. A failed German plan for preventing a 2 front war
  10. 20. Made up of Russia, France, Britain, Italy, US, and Serbia
  11. 21. Ally of Austra-Hungary
Down
  1. 1. WW1 PTSD
  2. 2. The battlefield between Russia and Germany
  3. 3. The last emperor Russia
  4. 4. A line of rope with many spikes to prevent trench break throughs
  5. 6. Ones loyalty and devotion to their country and its interests over other countries
  6. 8. A peace treaty that ended WW1
  7. 9. Resulted due to underestimation of new technology
  8. 12. A shotgun largely effective in trenches
  9. 14. Attempted to be neutral in the war, invaded by Germany
  10. 15. The first country in the Central Powers