Sathasi Raj

Satasi Raj was the Kingdom of Raja of Rudrapur covering over half of north and east India in pre-British era.
Background.
Rudrapur is a town and a nagar panchayat in Deoria district in the Indian state of Uttar Pradesh. Previously known as Satasi Raj.
Recorded history of the dynasty.
According to one existing version, the founding members of the Satasi royal family are said to have come to Awadh, from the banks of the Rapti river.
Modern Era.
The Maharajah (Emperor) system was abolished by Indian Constitution in 1971 with some acceptable privileges.
Controversy.
Given that royalty was abolished by Indian Constitution in 1971.