In 1629, Emperor Shahjehan appointed Ahmad Khan as the sufedar of Patna. Palamu was conferred to him as his Jagir. Ahmad Khan imposed tax to the tune of 1,36,000. The non-payment of this mandatory tax by Chero rulers of Palamu led to three successive attacks by the Mughals. The first invasion took place in the reign of Pratap Rai. The Mughal army was led by Shaista Khan the Governor of Bihar. The army reached the fort of Palamu, defeated Pratap Rai and compelled to pay tax of 80,000. The second invasion was called by internal bickerings. As a result of this Pratap Rai after negotiations agreed to pay an annual tax off Rs. One lakh only On the recommendation of Itaikad Khan, successor of Shaista Khan, Emperor Shahjehan gave Palamu to him as a military chief on a jama of 2.5 laksh. Despite two invasions the payment of tax by Chero Chiefs were never regular. As a last resort, Daud Khan, Governor of Bihar, left Patna with a strong force in 1660 and in spite of heavy drawbacks and difficult terrain, reached within 3 km of Palamu. There was an engagement and fighting which lasted three days, after which the fort was captured. Palamu was then placed in charge of Muhammadan Faujdar. But this system was done away soon and Palamu was placed under the direct control of the Viceroy of Bihar in 1660. Palamu was again invaded by Subedar Sarballand Khan. But actual fighting was warded off by the payment of one lakh of rupees in cash and in the shape of diamonds.