Peshwa Balaji Baji Rao also known as Nana Saheb

Balaji Baji Rao (December 8, 1720 – June 23, 1761), also known as Nana Saheb, was a Peshwa (prime minister) of the Maratha Empire in India. After Baji Rao died in April 1740, Chhatrapati Shahu appointed 19-year old Balaji as the Peshwa in August 1740, despite opposition from other chiefs such as Shahu's own relative Raghoji I Bhonsle.The Maratha noblewoman Tarabai was the head of a family that was a rival claimant to the Chhatrapati title. Originally a rival of Chhatrapati Shahu, she later pretended reconciliation with him. In the 1740s, during the last years of Shahu's life, Tarabai brought a child to him: Rajaram II. She presented the child as her grandson, and thus, a direct descendant of Shivaji. Shahu adopted the child, and after his death in 1749, Rajaram II succeeded him as the Chhatrapati.The next year, Peshwa Balaji Rao left to fight against the Nizam of Hyderabad. In his absence, Tarabai urged Rajaram II to remove him from the post of Peshwa. When Rajaram refused, she imprisoned him in a dungeon at Satara, on 24 November 1750. She claimed that he was an impostor, and that she had falsely presented him as her grandson. Tarabai was unsuccessful in getting support from other ministers and the Nizam Salabat Jung. However, she managed to enlist the help of another noblewoman, Umabai Dabhade.Umabai was the matriarch of the Dabhade family, whose members held the title of senapati (commander-in-chief) and controlled several territories in Gujarat. Her husband had been killed by the Mughals, and her eldest son had been killed by Balaji Rao's father for a rebellion against Chhatrapati Shahu. However, Shahu had forgiven the Dabhades and allowed them to retain their jagirs and titles on the condition that they would remit half of the revenues collected from Gujarat to his treasury. Umabai's minor son Yashwant Rao was made the titular senapati, while she held the actual executive power in Maratha territories of Gujarat. The Dabhades never actually shared any revenues, but Shahu did not want to take any action against a grieving mother. However, after Shahu's death Peshwa Balaji Rao faced an empty treasury and pressurized the Dabhades to share Gujarat revenues as per the agreement. Umabai personally met him in 1750 and argued that the agreement was void because the Dabhades had signed it under force. The Peshwa refused to entertain this argument.

The Gaekwads were originally lieutenants of the Dabhade family.Pilaji, and after his death in 1732, Damaji held the actual military power as Yashwant Rao was a minor. Even as he grew up, Yashwant Rao got addicted to alcohol and opium, and Damaji gradually increased his power during this time.In May 1751, the Peshwa arrested Damaji Gaekwad and his relatives, and sent them to Pune. Sometime later, the Dabhades were also arrested, and deprived of their jagirs and titles. In March 1752, Damaji finally agreed to join Balaji Rao. In return, he was made the Maratha chief of Gujarat, and Balaji Rao offered him assistance in expelling the Mughals from Gujarat. Gaekwad promised to pay an annual tribute of ₹ 525,000 to Peshwa in addition to a one-time payment of ₹ 1,500,000. He was also asked to maintain a cavalry of 20,000 horses in service of the Peshwa.

During Baji Rao's tenure, the Mughals had nominally granted the Malwa to the Marathas, but the control was not actually passed to the Marathas. After becoming Peshwa, Balaji Rao approached the Mughal emperor through Jai Singh II, and managed to get appointed as the Deputy Governor of Malwa (with Ahmad Shah as the titular Governor). In return, he pledged faithfulness to the Mughal emperor. He also agreed to keep a force of 500 soldiers at the emperor's court, in addition to providing a force of 4,000 soldiers on a need basis.

In 1748, Javed Khan, a rival of the Mughal wazir Safdarjung invited the new Nizam of Hyderabad Nasir Jung, to join an alliance against the wazir. Safdarjung requested Maratha support against Nasir Jung. Balaji Rao dispatched Scindia and Holkar chiefs to prevent Nasir Jung from reaching Delhi, and thus, saved Safdarjung.

Starting in 1748, the Afghan king Ahmad Shah Durrani (Abdali) launched several invasions of India, forcing the Mughals to seek Maratha help. In 1752, the Rohillas of the Doab region rebelled against the Mughal emperor. They defeated Safdarjung in a battle, and invited Durrani to invade India. Once again, Safdarjung sought assistance from the Marathas, who helped him crush the rebellion. The Marathas and the Mughals signed an agreement in 1752. The Marathas agreed to help the Mughals defeat external aggressions as well as internal rebellions. The Mughals agreed to appoint Peshwa Balaji Rao as the Governor of Ajmer and Agra. The Marathas were also granted the right to collect chauth from Lahore, Multan, Sindh, and some districts of Hissar and Moradabad. However, the Mughal emperor had also ceded Lahore and Multan to Ahmad Shah Durrani in order to pacify him. In addition, he did not ratify the transfer of Rajput-ruled territories like Ajmer to the Marathas. This brought the Marathas in conflict with Durranis as well as Rajputs.

The defeat at Panipat resulted in heavy losses for the Marathas, and was a huge setback for Peshwa Balaji Rao. He received the news of the defeat Panipat on 24 January 1761 at Bhilsa, while leading a reinforcement force. Besides several important generals, he had lost his own son Vishwasrao in the Battle of Panipat. He died on 23 June 1761, and was succeeded by his younger son Madhav Rao I. Incidentally, Nanasaheb Peshwa, four months prior to his death, married a girl who was 8 or 9 years old.