Mahajanapadas
There were 16 Mahajanapadas:
1. Anga
2. Magadha
3. Kasi
4. Kosala
5. Vajji
6. Malla
7. Cheti
8. Vatsa
9. Kuru
10. Panchala
11. Matsya
12. Surasena
13. Assaka
14. Avanti
15. Gandhara
16. Kamboja
-Most important Janapadas were Magadha, Kosala, Vatsa & Avanti.