Palamu district is one of the twenty-four districts of Jharkhand state, India. It was formed in 1892. The administrative headquarter of the district is Medininagar (formerly DaltonGanj), situated on the Koel River. History The Palamu district have site of Neolithic and Chalcolithic settlement in the confluence of Son and North Koel river in Kabra-Kala mound. It is speculated that the Kharwars, which formerly controlled Rohtas Fort to the north, migrated to the current territory of the district. The purportedly Kharwar ruler Pratapaghavala, who controlled part of Rohtas district, also built roads into what is now northern Palamu district and had power west of the Son. Kurukh tribes living in northwestern Jharkhand record a tradition of once having controlled the Rohtas fort, but were surprised by their enemies during a festival and forced to flee to the south. The Cheros record a similar story of once controlling the Rohtas fort but being forced southwards. In the early 16th century, the Cheros were a powerful community of robbers and armed militia based around the jungles of southern Bihar. Sher Shah Suri sent one of his generals, Khawas Khan, to destroy the powerful chief Maharta Chero, a deed so important it was recorded as one of Sher Shah's great deeds in the Wakiat-i-Mustaki. In the late 16th century, the Raksel Rajputs controlled Palamu. The Mughal commander Man Singh had invaded Palamu, but in 1605 after Akbar died the Mughals were driven out. The Chero ruler Sahabal Rai had become a prisoner in Delhi due to his constant raiding of Bihar. His son, Bhagwat Rai, continued the same policy, but was soon attacked by Mughal forces and fled to Dev Sahi, a Rajput holding the fort of Dhanundanr. With Puran Mal, Dev Sahi's son, he took service with the Raja of Palamu Man Singh. When Man Singh had gone to Surguja in 1613, Rai killed the Raja's family and took his throne. Under Bhagwat Rai's grandson Medini Rai, the Chero kingdom expanded to the height of its territory: covering large parts of what is now southern Bihar, as well as Hazaribagh. Medini Rai was able to launch expeditions against the Maharaja of Chota Nagpur and built the Fort of Palamu. In 1629, the Mughal subedar of Patna Ahmad Khan forced the Cheros to pay an annual tribute to the Mughals. In 1641, Chero ruler Pratap Rai refused to pay tribute to then-emperor Shah Jahan.