After conquering the fort of Thun, Sawai Jai Singh tied the pag of Sardari on the head of Badan Singh on 2 December 1722, tilaked him like a king and honored him with the rank of Thakur by giving Pacharangi Nisan with five costumes. Thus Badan Singh became the Khidmati Jagirdar of the Kachhwahas. Badan Singh was declared the king of Deeg and given the title of Brajraj. The annual tax to be paid by him to the emperor of Delhi was fixed. Thus in 1722 AD a new princely state named Bharatpur was formed. Badan Singh was completely different in character and temperament from his predecessor Jat leaders. He was humble and reliable, due to this he could establish a big kingdom and get the position of king. He got many buildings, pakka forts and walls constructed in his capital Deeg. He built forts at Deeg, Kumher, Bharatpur and Vair. He took his kingdom to an area of eighty lakh rupees annual deposit. He formed the Quami Ekta Parishad of chieftains of Jat, Dunga and Palas and started ruling with their help. He organized his court and his army according to the Mughal method.
Birth of Rajkumar Surajmal
Some historians consider Surajmal to be the son of Badan Singh and his queen Devaki, who was a resident of Kama. While some other historians consider Surajmal to be the son of the widow of Surajmal's brother Roop Singh, who had come to Badan Singh's palace after Roop Singh's death and was beheaded by Badan Singh. The exact date of when Surajmal was born is not available. Yet it is believed that Maharaja Surajmal was born in February 1707.
Construction of new fortifications at Deeg, Kumher and Bharatpur
Deeg town was situated on the main road between Agra and Mathura. Because of this, there used to be attacks of enemies on Deeg. The Jats had to exert a lot of strength in resisting these attacks. Due to this, Badan Singh built a strong fort with 20 feet wide walls in the south of Deeg town in AD 1730. In the same year a fort was also built at Kumher. In AD 1732, Surajmal started building a fort named Lohagarh in the southern part of Bharatpur city. The construction of this fort was completed in eight years. Raja Badan Singh built a fort in Vair in AD 1738. He provided Surajmal to Kumher and Pratap Singh a fort of enmity so that there would be no conflict between the two brothers regarding succession.
Jats' reply to Peshwa Bajirao
After becoming the king, Badan Singh used to visit Raja Jai Singh every year to his capital where he was welcomed like kings. The place where he stayed was given the name Badanpura. Peshwa Bajirao came to Jaipur in AD 1736. Maharaja Jai Singh organized a grand court in Jaipur in honor of the Peshwa. Prince Surajmal of the princely state of Bharatpur was sent to this court. During this, Surajmal was introduced to Peshwa Bajirao, but Bajirao said some derogatory words about Surajmal's clan. Surajmal understood the fragility of his kingdom at that time, so he did not say anything, but Thakur Shardul Singh of Halena, who was present with him, reminded the Peshwa that Kshatrapati Shivaji belonged to a lower family than this.
Invasion of Nadirshah
In 1739 AD, Shah Nadir Shah of Persia attacked Delhi, due to which the strength of the Mughal Empire was greatly weakened and the Jats did not face much difficulty in establishing their kingdom.