World war one.

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Across
  1. 3. : Germany had to pay the countries it had attacked
  2. 8. : WWI was the first time soldiers fought mainly in a _____
  3. 9. reagan: Who was president in 1987.
  4. 10. labor : What were the critics worried about in the 1800s.
  5. 11. dogs: What did guards use to hunt people down.
  6. 12. : Luxury cruise liner sunk by German u-boats
  7. 13. : Triple entente - England, ___, and Russia
  8. 14. : German u-boats
  9. 16. union: Who threatened America's national security
Down
  1. 1. : Front
  2. 2. : Germany lost its ___ in Africa and Asia
  3. 4. war: What was the united states worried about towards the end of the cold war.
  4. 5. : Germany had to give Alsace-____to France
  5. 6. : New weapon, ____thrower
  6. 7. : War ____ clause - Germany had to admit WWI was their fault
  7. 11. : New weapon armored vehicle
  8. 15. : Battle of the ___ river - British lost 600,000, Germans lost 500,000. only gained 7 miles!