How did Ghana Control trade?

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Tags

1. #superior
2. #power
3. #armies
4. #exchange
5. #ghana
6. #built
7. #people
8. #increased
9. #nearby
10. #gained
11. #north
12. #control
13. #rulers
14. #goods
15. #weapons
16. #south
17. #equipped
18. #trade
19. #eventually
20. #merchants