1. After crossing the Dihang gorge, the Himalayas take a sudden southward turn and form a series of comparatively low hills running in the shape of a crescent with its convex side pointing towards the west.
2. These hills are collectively called the Purvanchal because they are located in the eastern part of India.
3.Extending from Arunachal Pradesh in the north to Mizoram in the south, they form India’s boundary with Myanmar.
4. It is obvious that the eastern hills decreases as we move from north to south. Although comparatively low, these hill ranges are rather forbidding because of the rough terrain, dense forest and swift stream.