1730s and 1740s, Kohat escaped destruction as Emperor Nader Shah's forces followed invasion routes north in the Peshawar Valley. Following the departure of Persian forces, Kohat was absorbed into the Durrani Empire by 1747. Following the fall of Shah Shuja Durrani in 1810, Kohat was brought under control of the Durrani kingdom based in Peshawar and Kabul, which leased lordship of the city to various chiefs. The first chief of Kohat was Mirza Girani, who was followed in succession until 1818 by Shakur Khan, and Sultan Muhammad. In 1818, Kohat came under the control of Samad Khan following the collapse of Durrani suzerainty, though the city then came under the influence of Pir Muhammad in 1827. Sikh period Ranjit Singh's armies marched to Peshawar in 1819. In 1834, Azim Khan was defeated by the Sikhs and the chiefs of Peshawar became tributaries of the Sikh Government. Kohat was captured by Sikh governor Avtar Singh Sandhanwalia in 1839, and became part of Ranjit Singh's Sikh Empire, though Pir Muhammad was allowed to continue administering the region around Kohat. In 1840, the Sikhs abandoned Kohat, and Sultan Mohammed became ruler of Kohat. In 1848 during the Second Anglo-Sikh War, Colonel George Lawrence, the British Resident at Lahore, sought refuge in Kohat, but was instead taken prisoner and handed to Sikh forces in Peshawar under Chattar Singh before being released. In 1849, Kohat and the rest of Punjab was formally annexed by the British. British period Following British victory over the Sikhs in 1848, Kohat came under British rule and was annexed in March 1849. Lieutenant Pollack was appointed as Kohat's first Assistant Commissioner. British authorities in Peshawar commenced construction of the Kohat Pass road in 1849, and completed it by 1850 despite violent opposition from local tribes. The pass was closed temporarily in 1853 after a quarrel arose among nearby tribes. The road which connected Kohat to Rawalpindi via Khushalgarh was of little trouble compared to the Kohat Pass road. Kohat remained largely peaceful during the Sepoy Mutiny of 1857, and local Pashtun soldiers largely ignored calls for rebellion. The British established a Hill Station at Cherat, just north of Kohat, in the 1860s. Kohat Pass road was closed on and off for several more years on account of quarrels among local tribes, including in 1865 when it was closed for more than one and a half years. Armed skirmishes between British