Sher Shah’s father Hassan Khan Suri was an Afghan adventure, he got the jagir of Sasaram as a reward for his services to Jamal Khan, and the Governor of Province during the latter’s attachment with the king of Jaunpur. But the Afghan Jagirdar was not able to exercise full control over this subject since the allegiance of the people was very lose and the landlords were particularly independent. In 1529 Babar invaded Bihar, Sher Shah who lost opposed him. Babar has left in his memories an interesting account of the place. He mentioned about the superstitions of the Hindu with regard to river Karamnasa and also described how he swam across the river Ganga at Buxar in 1528.
When Babar died , Sher Shah become active again. In 1537 Humayun advanced against him and he seized his fortresses at Chunar and Rohtas Garh. Humayun proceeded to Bengal where he spent six months, while on his return journey to Delhi he suffered a crushing defeat at the hands of the Sher Shah at Chausa. This victory secured for Sher Shah the imperial throne of Delhi. “ The rule of Suri dynasty , which Sher Shah founded, was very short lived. Soon the Mughals regions the imperial throne of Dehli. After his assassination, Akbar tried to extend his empire and consolidated it. The district of Rohtas was thus included in the empire”.