Was Azerbaijan part of the Persian Empire?

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Tags

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2. #caucasus
3. #eurasia
4. #until
5. #challenged
6. #unsourced
7. #course
8. #river
9. #material
10. #russia
11. #iranian
12. #region
13. #north
14. #contemporary
15. #occupied
16. #among
17. #territory
18. #removed
19. #country
20. #century
21. #which
22. #republic