The early Vedic Aryans lived in the area known as sapta-sindhu meaning area of seven rivers. This area largely covers the northwestern part of South Asia up to river Yamuna.
The seven rivers included Sindhu, Vitasta (Jhelum), Asikni (Chenab), Parushni (Ravi), Vipash (Beas), Shutudri (Sutlej) and the Sarasvati. In this area the Rigvedic people lived, fought battles, grazed their herds of cattle and other domesticated animals.
Gradually moving eastward, they came to occupy eastern U.P. (Kosala) and north Bihar (Videha) during the Later Vedic period. Here, they came into contact with the people who spoke languages different from their own and were living in this area for long.