Saadat Khan was succeeded by his son-in-Iaw Muhammad Muqim .Since Burhan-ul-mulk had left behind only five daughters so there was no male heir to the throne. Muhammad Maqim, was given the title of Abul Mansur khan by the emperor. Muhammad Maqim had already distinguished himself by achieving notable achievement in every expedition led by Burhanul-Mulk, gaining the post of Mir Atish (superintendent of the Royal Artillery). Soon he was appointed as the Wazir of Mughal emperor Ahmad Shah on 29 June 1748. with the title of Safdar Jang .Nawab Safdar Jang founded Faizabad and purchased Qila Likhna Safdar Jung's rule of 15 years saw no peace as due to continuous struggle with the Bangash Pathan's of Farrukhabad. Safdar Jang’s most trusted officer was Raja Newal Rai, who was killed ,when he was fighting against the forces of the Afgan Nawab Ahmad Khan Bangash of Farrukhabad on 13 August 1750 at Khudaganj. Soon Bangash became so powerful that he even defeated the forces of the wazir and occupied Lucknow. But the occupation was short-lived, since the Shaikhzadas of Lucknow could not able to bear the violence committed by the Bangash offcials. They revolted under the leadership of Muizuddin khan and expelled them from Lucknow. Consequently, Avadh again came under the administration of the Nawab Wazir. Later on, Safdar Jang had to leave for Delhi where court conspiracies against him were extensive. He returned to Awadh in 1753, but died within a year at Papar ghat, near Sultanpur in 1754,while struggling to reconsolidate his position. His mausoleum in Delhi is one of the finest pieces of architecture of that period. The palaces of the Shaikhzada of Lucknow that were taken over by Nawab Saadat Khan Burhanul-Mulk were finally declared the property of the Nawab Wazir by Safdar Jang and in return the Shaikhzadas were granted seven hundred acres of land in Dugawan .Safdar lung was a restless, impulsive and ambitious ruler who not only brought violent disturbances but also momentous vicissitudes for later regime.