World War I

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Across
  1. 7. the alliance of France, Britain, and Russia
  2. 8. the country germany invaded first
  3. 9. the year world war one started
  4. 10. the technology that stopped trench warfare
  5. 11. the man that killed the arch duke
  6. 12. the group of people who tried to assassinate the arch duke
Down
  1. 1. the treaty that was signed at the end of the war
  2. 2. another name for World War One
  3. 3. the alliance of Germany, Austria-Hungary, and Italy
  4. 4. the secret message sent to mexico from germany promising support in fighting US
  5. 5. Germany's war plan
  6. 6. This person's death sparked world war one