World War I

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Across
  1. 1. Germans used these to sink ships
  2. 4. France, Britain, and Russia are
  3. 7. Rapid growth in military
  4. 10. Deadliest gas
  5. 11. Intense pride in your country
  6. 12. Germans stayed in these for months
Down
  1. 2. British intercept this from Germany
  2. 3. When either side cannot have a clear victory
  3. 5. Competition of new land and resources
  4. 6. Used to persuade citizens for war purposes
  5. 8. came back to Russia from exile
  6. 9. Lenin's communist group