How janapadas grew into mahajanapadas, the early republics, the Second Urbanisation of the Ganga plains, the first coins and the great trade routes.
| First Urbanisation | the Harappan civilisation |
| Second Urbanisation | cities of the Ganga plains, 1st millennium BCE |
| Four strongest mahajanapadas | Magadha, Kosala, Vatsa, Avanti |
| Capitals | Magadha: Rajagriha; Vatsa: Kaushambi |
| Early republics | Vajji and Malla |
| Far south kingdoms | Cholas, Cheras, Pandyas |
| Days for a journey | distance ÷ distance a day, rounded up |
A caravan of traders on Uttarapatha covers about 25 km a day. How many days will a 560 km stretch take?
Working: 560 ÷ 25, rounded up
Answer: 23 days