Answer:
Going by blanks:
1. civilizations
2. Aztecs
3. century
4. 1500's
5. conquistadors
6. enslaving
7. treasures
8. 300
9. New Spain
10. empire
11. September
12. revolt
13. executed
14. Liberty
15. defeated
16. anniversary
Step-by-step explanation:
Just carefully read, but this is quite an interesting story! :) Good Luck!