World war I

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Across
  1. 3. - Formal agreement between countries; ended the war officially.
  2. 5. - Information used to influence public opinion during the war.
  3. 7. - Agreements between nations for mutual protection.
  4. 8. - Deep, narrow ditches where soldiers fought during the war.
  5. 11. - Passenger ship sunk by a German U-boat, angering the U.S.
  6. 13. - Title of the German emperor during World War I.
  7. 15. - Pride in one's country, often a cause of conflict.
  8. 17. - Situation where neither side can make progress.
  9. 19. - A friendly understanding or alliance between countries.
  10. 20. - Large-caliber guns used in warfare.
Down
  1. 1. - The line or area where opposing armies face each other.
  2. 2. - Large airship used by Germans for bombing raids.
  3. 4. - German submarine used to disrupt Allied shipping.
  4. 6. - One of the longest and costliest battles, fought in France.
  5. 9. - Mandatory enlistment of citizens into the armed forces.
  6. 10. - City where Archduke Franz Ferdinand was assassinated.
  7. 12. - Someone killed, wounded, or missing in action.
  8. 14. - Soldiers who fight on foot.
  9. 16. - Type of poisonous gas used in the trenches.
  10. 18. - Agreement that ended the fighting on November 11, 1918.