Shaista Khan was sent to destroy the Chero kings with an expedition of 15,000 infantry and 5,000 cavalry, which penetrated as far as Ara and laid siege to the Palamu Fort. During the siege, in 1642, the Cheros attacked a Mughal party, but was soon itself defeated, forcing Pratap Rai to give a sum of Rs. 80,000. Pratap Rai was then betrayed by two of his uncles, Tej Rai and Darya Rai, who convinced Itikad Khan, Shaista Khan's successor, to support their coup if Pratap Rai was sent to Patna. The coup was successful, but Tej Rai still held Pratap Rai, so Darya Rai promised to give the fort of Deogan if Itikad Khan supported him with an army. Itikad Khan's army took over Deogan in October 1643 and defeated Tej Rai's force, allowing Pratap Rai to retake Palamu Fort. However as the Mughal army arrived, Pratap Rai surrendered and went to Patna. He agreed to pay Rs. 1 lakh in annual tribute and was made commander of 1000 horse and given Palamu as jagir. For the next twenty years however, the Cheros neglected to pay their tribute and continued to make raids into Mughal territory in Bihar. At the time Palamu was described as a well-populated city protected by two strong forts. In 1660, however, Subedar of Bihar Daud Khan had enough and invaded Chero territory. Khan first conquered Kotna, which the Cheros had abandoned, proceeded to Palamu Fort which took months due to the thick jungle. After a long struggle, Khan conquered the fort of Palamu and forced the Chero king to flee. The Cheros briefly regained the fort of Deogan, but soon lost it and Palamu was placed under a Muslim faujdar. In 1666 it fell under the direct control of the Subedar of Bihar, and became a fief. The Cheros still held the southern part of the district, but the northern part was given to various nobles. The Raja of Sonpura was the most important of these families, but had fallen out of favour with the Mughal court and lost his lands to Ghulam Hussain Khan after a protracted struggle. Khan controlled much of the northwest of present-day Jharkhand, even as far as the Chota Nagpur kingdom. In 1720, Palamu was invaded again due to refusal to pay tribute, although the expedition leader was bought off with a large sum of gold and diamonds, and the