WWII crossword

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Across
  1. 1. went through this country to attack france in ww1
  2. 3. Main reason or the person who started ww2
  3. 6. joined Hitler in his plans
  4. 7. bellow united states
  5. 9. next to germany
  6. 10. planes
  7. 11. states of america
  8. 13. joined Hitler in his plans
Down
  1. 2. kingdom
  2. 4. capital of england
  3. 5. Germans and Hitler invaded this country hard
  4. 7. gun
  5. 8. Capital of Germany
  6. 11. Old Russia
  7. 12. the boot