The Chauhan rule ended with the merger of Patna and Sonepur into Orissa on the January 1, 1948. They together form the district of Balangir. Sonepur was carved out as a separate district on April 1, 1993. The last ruler of Patna, Rajendra Narayan Singh Deo successfully made the transition to democratic politics. He became the Chief Minister of Odisha from 1967 until 1971.