Delhi has great importance in Indian history. Similarly, Agra also has great importance in Indian history. Agra was the richest city during 1761. Maharaja Suraj Mal decided to capture Agra fort to re-establish his influence in doab region. On 3 may 1761 the Jat army of Suraj Mal with 4000 Jat soldiers reached Agra under the command of Balram Singh and gave the massage of Maharaja Suraj Mal to the kiledar (incharge) of Agra fort that the army wants to cross Jamuna and needs camping place. The kiledar gave the sanction for camping. Meanwhile the Jat army started entering the fort, which was resisted by the guards in which 200 people died. Jat army started war from Jamamasjid. During this period Maharaja Suraj Mal stayed at Mathura to observe the situations. On 24 May 1761 Maharaja Suraj Mal along with Imād and Gangadhar Tantya moved from Mathura, crossed Jamuna and reached Aligarh. From Aligarh his army moved and captured the areas of Jat ruler koīl and Jalesar. They reached Agra to help his army at Agra in the first week of June. Maharaja Suraj Mal arrested the family members of the guards staying in Agra town and pressurized the guards of fort for surrender. At last the kiledar agreed to surrender by receiving a bribe of Rs 1 lakh and jagir of five villages. Thus after a seize of one month Maharaja Suraj Mal captured Agra Fort on 12 June 1761 and it remained in the possession of Bharatpur rulers till 1774. After Maharaja Suraj Mal, Maharaja Jawahar Singh, Maharaja Ratan Singh and Maharaja Kehri Singh (minor) under residentship of Maharaja Nawal Singh ruled over Agra Fort. There is a haveli in the name Maharaja Nawal Singh in Agra Fort and also a Chhatri of Maharaja Jawahar Singh built in right-side of Khasmahal near the Chhatri of Rosanara-Jahanara.
Reference :-
1. Agra Gazeteer 1884, page 620
2. Dr. Prakash Chandra Chandawat: Maharaja Suraj Mal aur unka yug, Jaypal Agencies Agra, 1982, Pages 197-200