After ruling the state for twenty years, that is, around 1742 AD, the light of the eyes of Raja Badan Singh started decreasing. Therefore, he handed over the rights of state expansion, military organization and political negotiations to his eldest son Surajmal and himself started making internal management of the state by sitting with the Qaumi Parishad. In AD 1745, Prince Pratap Singh died suddenly and Raja Badan Singh became completely detached from the state work. Thus in AD 1745, Surajmal became the only real ruler of the state, but he did not declare himself the king while his father was alive.
Aid Fateh Ali Khan in Chandaus battle
In AD 1745, Prince Surajmal led an army of Jats against Ali Muhammad Ruhele, on behalf of the emperor of Delhi, Muhammad Shah. In this battle, Surajmal made a mark of his bravery. The following year in AD 1746, Surajmal helped Subedar Fatah Ali Khan against Asad Khannazad and Fatah Ali Khan was successful in taking back his jagir. Surajmal defeated Assad's army at Chandaus. Assad was killed in the war. Surajmal returned with a lot of money from the battle of Chandaus. Presently Chandaus is located in Aligarh district.
Jaipur King Ishwari Singh's help
In AD 1743, the king of Jaipur, Jai Singh died and his sons Ishwari Singh and Madho Singh fought for the rights of the kingdom. The Maharana of Udaipur took the side of the younger son Madho Singh because Madho Singh was born from the womb of the princess of Udaipur, who was married to Raja Jai Singh. Raja Badan Singh ordered Prince Surajmal to take an army to Jaipur to help the elder prince of Jaipur, Ishwari Singh. Surajmal went from Kumher to Jaipur with 10 thousand horsemen, 2 thousand foot and 2 thousand spearmen. Ishwari Singh gave equal respect to Raja Surajmal. On 21 August 1748, the war started between the armies of Ishwari Singh and Madho Singh. In this war that lasted for three days, Surajmal showed amazing might and he single-handedly killed fifty enemy soldiers and injured 160 enemy soldiers with his sword. Due to this, Surajmal became famous as a fighter hero among the Marathas and Rajputs. This war is called the Battle of Bagru. Ishwari Singh was victorious in this war.
Friendship with Safdarjung
In AD 1748, the emperor of Delhi, Muhammad Shah died. At that time his son Ahmad Shah was in Panipat. Nawab Safdarjung was with him in those days. Safdarjung declared Ahmad Shah as the new emperor. Ahmad Shah declared Safdarjung as his Wazir. Nizamulmulk, the vizier of Muhammad Shah, was alive at that time. So the new vizier Safdarjung sought the cooperation of Surajmal. Surajmal supported him in the beginning, but when Chaudhary Charandas of Faridabad and his son Balram Singh came to Surajmal's shelter by defying the Mughal officer of Faridabad, Surajmal gave them abhay and killed Murtaza Khan on Faridabad pargana. Got the right Nawab Safdarjung wrote a letter to Surajmal to remove his possession from Faridabad but Surajmal refused to do so. On this Safdarjung took the army and climbed on Surajmal. Surajmal also agreed with his army. At the same time, Safdarjung got information that Ruhelons had attacked his province of Awadh. So Safdarjung went towards Awadh and talked about a treaty with Surajmal. After this treaty, Safdarjung and Surajmal again became friends. King Surajmal and his Bakshi were given blooms by Emperor Ahmad Shah.
First campaign against the Roohels
Shortly after this treaty, Ahmed Shah Bangash, the leader of the Ruhls, killed Naval Rai, the representative of Safdarjung, and pushed his army out of Khudaganj. A lot of money was spent in the hands of souls. On this, Safdarjung launched a campaign against the Roohels. Surajmal supported Safdarjung in this campaign. He captured Farrukhabad, the capital of Ahmad Bangash. Ruhelon sent a proposal to befriend Surajmal but Surajmal returned his messenger saying that I have given a promise to Safdarjung. Jats saved Safdarjung's life in the war between Safdarjung and Ruhelon, but the final result of this war did not come. Thus Surajmal made Jat politics credible and solid. In this respect, he was in stark contrast to his predecessor, the Jat leader, Chudaman.
Victory over Mir Bakshi
Jodhpur King Maharaja Abhay Singh died on 20 June 1749. A war broke out between Abhay Singh's son Ram Singh and Abhay Singh's brother Bakht Singh for the right over the Jodhpur state. The Mughal emperor Ahmed Shah took the side of Bakht Singh and sent Mir Bakshi Salabatjung to help Bakht Singh by giving 18 thousand soldiers. Mir Bakshi decided that by attacking the Jats at his hands, he should again take away from them the provinces of Agra and Mathura which the Jats had captured in the recent past. He captured the fort of Neemrana which was under the control of Jats. On this Surajmal sent his messenger to talk to Mir Bakshi but Mir Bakshi did not talk to Surajmal's messenger. When Mir Bakshi reached a place called Sarai Somachand, Surajmal surrounded the Mughal army with 6000 fast moving army. On this, Mir Bakshi ordered Kumuk from Delhi. When this Kumuk came, the Jats blocked his way and started firing at him with guns. In this battle, Jats killed a large number of Mughal soldiers. Forced, the Mughal generals Ali Rustam Khan and Hakim Khan were also killed. Salabat Khan sent a proposal for a treaty to Surajmal. Surajmal accepted this offer. The terms of this treaty were as follows-
(1.) The government of the emperor gives a promise not to cut the Peepal trees.
(2.) The emperor's government will not hinder the worship of the Peepal tree.
(3.) The emperor's government will not insult or damage the Hindu temples of Brij.
(4.) Prince Surajmal will take fifteen lakh rupees from the Rajputs as revenue of Ajmer province and give it to the royal treasury
(5.) Mir Bakshi will not go beyond Narnaul.
This success instilled new self-confidence in Surajmal and his men. The military strength of the Jats was proved. The terms of this treaty clearly recognized the excellent position of the rulers of Bharatpur in the Braj Mandal.
Second campaign against Rohailo
In AD 1751, Safdarjung again campaigned against the Ruhails. This time he received armies from Marathas at an expenditure of 25 thousand per day and from Jats at an expenditure of 15 thousand rupees per day. The combined armies of Jats and Marathas devastated the region of the Ruhals.