Sangram Singh initially was allegiance to Akbar, but during the reign of Jahangir, he declared himself independence and was killed during battle with Mughal forces due to assassination.
[1] After his death, his son Toral Mal converting to Islam, changed his name to Roz Afzun, became loyal of Mughal and deployed as king of Kharagpur by Jahangir.
Then he participated Mughal expedition led by Shahbaz Khan Kamboh against the Afghans in Bengal and Odisha.
[1] In 1591, he participated in the Mughal expedition against Qutlugh Khan Lohani of Odisha with Man Singh and Puran Mal.
According to memoir of Jahangir, he collected around 4000 troops and large numbers of foot soldiers and challenge Mughal authority.
Baz Bahadur, the governor of Bihar attack Kharagpur and in the battle, Sangram Singh got killed and rebel were defeated.
They were fleeing from battle field but the wife of king, Rani Chandrajot, encouraged the soldiers to fight.
Jahangir impressed with Toral Mal's manners and conversation advised to change his religion, to which he agreed.
[1] Robert Montgomery Martin, collected local account, according to which Todar Mal was appointed as morchulburdar a person who fan the king with features of Peacock.
Then Emperor married Roz Afzun to daughter of Murad Bakhsh and made him commander of 3,000 men and his sons that of 1000.