World War I (Aubree)

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Across
  1. 5. to stop supplies from entering a country
  2. 7. a submarine operate underwater
  3. 9. was an absolute ruler
  4. 10. the United Stated maintained this until 1917
Down
  1. 1. to assembly military for active service
  2. 2. this happened to Archduke Ferdinand in 1914
  3. 3. a tube shaped bomb that is fired underwater
  4. 4. to enter into battle
  5. 6. Tsar Nicholas II did this to his throne on March 15, 1917
  6. 8. these are made to expland their empires