World War 1

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Across
  1. 2. The main cause for World War 1
  2. 6. Archduke Franz _________
  3. 8. Association formed for mutual benefit
  4. 9. flying aircraft
Down
  1. 1. Was a telegram for Mexico from Germany
  2. 3. Warfare technique used in war
  3. 4. Vehicles with heavy armory
  4. 5. Plan formed by Germany
  5. 7. When countries disagree a ___ happens