[5] During the 1857 uprising, under the "Delhi Agency" there were seven princely states, Jhajjar, Farrukhnagar, Ballabhgarh, Loharu, Pataudi and Dujana.

[8] Nahar refused to extend any help to District Collector William Ford, who was collecting forces to curb the uprising.

Nahar actively recruited sepoys of the native infantry or cavalry, who revolted against the British, in services of his Ballbhgarh forces with enhanced pay and promotional ranks.

Incidentally, one such sepoy who was granted rank of Naik, appeared as a witness to testify the fact before the British Military Commission, which was established to prosecute Raja Nahar Singh.

To further fortify his armed strength, the Raja not only raised new levies but also collected as much as possible latest weaponry and other war material as was revealed from the recovery of large number of horses, bullocks, carts, English rifles and dresses from his fort after the British assaulted it.

[10][11] Raja Nahar Singh of Ballabhgarh supported the Revolutionary Government and faithfully obeyed the instructions issued to him in connection with the maintenance of peace and order, recruitment of forces and collection of funds for the War.

[12] Nahar Singh, the Raja of Ballabgarh was 32 years old when he threw his small army into the fray against the British during the 1857 uprising.

Refusing an offer to save himself by acknowledging British supremacy, he was hanged in Chandni Chowk on 9 January 1858 and his estate was forfeited.

[13] He was charged by the colonial rulers for assisting rebellion with money, provisions and arms and by sending troops to Palwal, for taking it from the British Government in India.

[18] Kushal's son Giriraj Singh, and his descendants, continued to rule the Kuchesar State with the title of "Rao".

[21] ‘Shaheed Maharaja Nahar Singh Marg’ near Wazirpur Depot in Delhi is a road named after him.

[23] The Raja Nahar Singh Kartik cultural festival is held annually at his 18th century Nahar Singh Mahal palace, since 1996 by the Haryana Tourism, around November during the bright and auspicious autumn month of Kartik as per Vikram Samvat calendar.