World war 1 and 2

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Across
  1. 3. sudden slow down in business
  2. 4. military group
  3. 8. prime minister
  4. 10. ruled by one authority
  5. 11. country that stays out of other's affairs
  6. 12. American naval base
  7. 15. lightning war
  8. 16. mounted gun
  9. 17. the killing of jews
  10. 18. worker-representative committees
  11. 19. closed off
  12. 20. equipment for war
  13. 22. found in concentration camps
  14. 23. a stop in fighting
  15. 24. opposed the germans
Down
  1. 1. mass murder of people
  2. 2. peace treaty in WW1
  3. 5. delivering supplies by plane
  4. 6. right to rule
  5. 7. call up troops
  6. 9. UK'S leader
  7. 13. Germany's leader
  8. 14. country that suffered the most casualties
  9. 21. June 6,1944