Expanding interactions

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Across
  1. 1. German word
  2. 3. form of government
  3. 4. emperor of China
  4. 9. an emperor founder
  5. 11. Form of surgery
  6. 13. route
  7. 14. service examination examination held in India
  8. 16. military title
  9. 17. Empire
  10. 18. Family rulers
Down
  1. 1. European explorer
  2. 2. power people hold by ability
  3. 5. Device for recording information
  4. 6. Nickname
  5. 7. Highest “social class”
  6. 8. symbol
  7. 10. Chinese philosopher
  8. 12. Highest power/lead
  9. 15. Military leader
  10. 19. Also known as tropical year