Rise of 16 Mahajanapadas in 6th Century BC

16 mahajanpad history can be traced from Buddhist and Jain book like anguttara nikaya and mahavastu of Buddhism and Bhagwati Sutra of Jainism. There were sixteen of such Mahajanapadas: Kasi, Kosala, Anga, Magadha, Vajji, Malla, Chedi, Vatsa, Kuru, Panchala, Machcha, Surasena, Assaka, Avanti, Gandhara and Kamboja.

Initially coffee and Kaushal are where the most powerful and rich mahajanapada but over the period Magadh emerged as the most powerful mahajanapada.

MahajanapadasCapital
MagadhRajgriha
VajjiVaishali [Mahavira Born]
AngaChampa
MallaKusi Nagar
KosalaShravasti, Saket
ShurasenaMathura
ChediSuktimati
VatsaKoshambi
KasiBanaras
AssamakaPotana
AvantiUjjain, mahishmati
Gandharataxila
KuruKasthinapur
kambojaRajpura
PanchalaKampilya or Arichatra
MallaKushinagar [Buddha Died]