the Sulaiman Mountains, lying between 29°30′ and 34°15′ N. and 69°15′ and 72′ E., the name derives its name from, the three Deras : Dera Ismail Khan, Dera Fateh Khan, and Dera Ghazi Khan. It extends north to the Sheikh Badin National Park among the Sheikh Badin range, which divides it from the Marwat plain, and south to the town of Jampur, having a length of 325 miles and breadth of 50 miles. History The DeraJaat owes its existence as an historical area to the Baloch immigration in the fifteenth century. Sultan Husseyn of Langah Sultanate in Multan, being unable to hold his trans-Indus possessions, called in Baloch mercenaries, and assigned these territories to Malik Sohrab Dodai in jagir. Malik's sons, Ghazi Khan, Ismail Khan and Fateh Khan, founded the three Deras or 'settlements' named after them. Mughal era On Babar's conquest of Northern India in 1526 the Hooths submitted to him, and at his death the Derajat became a dependency of his son Kamran Mirza, the ruler of Kabul. Under Humayun the Baloch immigration increased, and they gradually pushed the Nahars farther south. All the Baloch tribes acknowledged the overlordship of the Hooth Nawabs, who ruled for about fifteen generations at Dera Ghazi Khan, taking alternately the style of 'Malik' and ` Ghazi Khan.' At Dera Ismail Khan ruled the Hooth Baloch chiefs, who bore the title of Ismail Khan from father to son and also held Darya Khan and Bhakkar, east of the Indus. Early in the eighteenth century the Hooths lost their supremacy, being overwhelmed by the Kalhora Dynasty Kalhoras of Sind. Post Mughal era In 1739 after Nadir Shah had defeated the Mughals and acquired all the territory west of the Indus, he made the Wazir, Mahmud Khan Gujar, governor in Dera Ghazi Khan under the Kalhora chief, who also became his vassal. Under Ahmad Shah Durrani the Kalhoras, now in a state of decadence, contended for possession of Dera Ghazi Khan, but Mahmud Khan Gujar appears to have been its real governor. He was succeeded by his nephew, who was killed in 1779, and the Durranis then appointed governors direct for a period of thirty-two years. Meanwhile, the last of the Hooth chiefs of Dera Ismail Khan had been deposed in 1770, and his territories also were administered from Kabul. In 1794 Humayun Shah attempted to deprive Zaman Shah Durrani of his kingdom, but he