In 1912 Kharsawan came under the authority of the province of Bihar and Orissa, which had been carved from the eastern districts of Bengal.

On 1 January 1948 itself, the tribals of these two princely states, who were in a majority, revolted against the merger with Orissa resulting to the thousands of tribes killed by the Orrisa military police .

On the basis of the Baudkar commission report, Saraikela and Kharsawan princely states were merged with Bihar on 18 May 1948.

The last ruler of the state, HH Raja Siram Chandra Singh Deo, signed the merger agreement acceding to the Indian Union on 18 May 1948.

The Maharaja of Darbhanga used to visit this state to pay respects as the trade route to the east coast ran through the thick jungles of Singhbhum and safety was guaranteed only to those who were in the good books.