Explanation:

Pulakeshin II defeated Harshavardhana on the banks of Narmada in the winter of 618-619. Pulakeshin entered into a treaty with Harsha, with the Narmada River designated as the border between the Chalukya Empire and that of Harshavardhana.Pulakeshin II was the most famous ruler of the Chalukya dynasty of Vatapi.During his reign, the Chalukya kingdom expanded to cover most of the Deccan region in peninsular India.