world war 1 crossword puzzle

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Across
  1. 3. a promise by the Germans not to sink vessels without warning.
  2. 6. American war hero.
  3. 7. act of giving two different sides equal strength or power.
  4. 10. a kind of biased communication designed to influence people's thoughts and action.
  5. 12. fighting between fortified ditches.
  6. 13. the 1919 treaty that ended world war 1.
Down
  1. 1. having merchant ships travel in groups protected by warships.
  2. 2. movement of many African Americans to northern cities from the south in the early 1900s.
  3. 4. building up armed forces to prepare for war.
  4. 5. french premier.
  5. 8. head of the committee on public information.
  6. 9. an international peacekeeping organization proposed by Wilson and founded in 1920.
  7. 11. truce agreement.