World War one

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Across
  1. 2. Who enters WWI in 1917?
  2. 3. Who won WWI?
  3. 7. Who intercepted the Zimmermann Telegram?
  4. 10. Who were the opposing forces during WWI?
Down
  1. 1. Where a lot soldiers fight?
  2. 4. What British passenger boat was sunk?
  3. 5. What country was most of the fighting done?
  4. 6. What do soldiers use a lot in battle?
  5. 8. What animal used to send messages?
  6. 9. Who promised land to Mexico?