He signed a treaty with his elder brother, Dara, which left him in control of Bengal, Orissa and a large part of Bihar, on 17 May 1658.
The force sent against Shuja was nominally under Dara's eldest son, Sulaiman Shikoh, with Jai Singh serving as his guardian and aide.
[8] The Mughal forces led by Suleiman and Jai Singh emerged victorious, compelling Shah Shuja to retreat to Bengal.
[7] Through diligent efforts and daily oversight, Shah Shuja oversaw the construction of a two-mile-long wall stretching from the hill to the river, blocking the plain outside the city.
He hesitated, lingering at Jaipur for several days to secure a safe passage forward with the assistance of local zamindars.
On April 13 he learns that Murad was just near him and Aurangzeb summoned him to come fast and on the next day they camped at Dharmat by the western bank of the Gambhira River.
The Rajputs densely packed within their narrow position, were severely galled by the barqandazes and archers of the princes’ army from front and flank, without being able to manoeuvre freely and give an effective reply.
The Rajputs, being divided into many mutually antagonistic clans, could not charge in one compact mass; they were broken up into six or seven bodies, each under its own chieftain and each choosing its own point of attack.
[12]: 227 The Maharajah had chosen his position so badly that many of the imperialists standing on the uneven ground could not join in the fight, and many others could not charge by reason of their being cramped within a narrow space.
Jaswant, too, was not the cool wise commander to keep watch on all the field and send reinforcements and the new development made his position untenable.
At the sight of the annihilation of their brave vanguard and a triumphant forward movement on the part of Aurangzeb, desertion appeared in the Maharajah's ranks.
[13] Even though the imperialists were close to defeat, there stood 2,000 Rathors under the banner of Marwar, ready to live or to die with their chieftain, besides many other Rajput and Mughal auxiliaries; and they offered a stubborn opposition.
Eventually, Murad Baksh and his Sowars began a swift charge into the far right flank of Dara Shikoh, commanded by Chatter Sal, without the orders of Aurangzeb.
[citation needed] When Dara Shikoh was informed about the death of Chattar Sal, Murad Baksh,[17] the collapse of the Rajput infantry and the Deccan Sowars, he immediately pushed towards their aid alongside Khalilullah Khan.
This battle, which took place on January 5th, was primarily characterized by an intense artillery exchange, with cannon, rockets, muskets, and hand grenades being employed extensively by both sides.
Faced with bleak prospects and the fear of public execution if captured alive, Shah Shuja abandoned Bengal permanently and sought refuge in Arakan.
[19][20] Jahanara Begum Sahib, Mumtaz Mahal's eldest surviving daughter, voluntarily shared his 8-year confinement and nursed him in his dotage.
Confined to bed, he became progressively weaker until, on 30 January, he commended the ladies of the imperial court, particularly his consort of later years Akbarabadi Mahal, to the care of Jahanara.
Shah Jahan's chaplain Sayyid Muhammad Qanauji and Kazi Qurban of Agra came to the fort, moved his body to a nearby hall, washed it, enshrouded it, and put it in a coffin of sandalwood.