World War I

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Across
  1. 3. planned system
  2. 4. not safe
  3. 5. killing
  4. 8. wanted to kill the Archduke and his wife
  5. 10. British officer
  6. 11. Allies tries to open a Balkan front by landing forces
  7. 12. a failed plan
  8. 13. Alliances formed in 1882
  9. 15. constant fight
  10. 18. A duty of a man over 18
  11. 19. the United States' reason to join the World War I
  12. 21. World War I
  13. 22. western front
  14. 23. Consider as an act of war in 1914
  15. 24. supported by Russia
Down
  1. 1. sinking military ships and the Lusitania
  2. 2. dig out hole in World War I
  3. 3. Germans killing babies and women
  4. 6. Assassinated by Garilo Princip
  5. 7. person in charge
  6. 9. shot the arch duke and his wife
  7. 14. did not listen to leaders of Russians army on mobilization
  8. 16. Alliances formed in 1907
  9. 17. Cause of world war I with weapons
  10. 20. having mutual benefits