another campaign with 30,000 cavalry to assist Shah Nawaz Khan, who was resented for tax-evasion in the Mughal imperial court and opposed by the Grand Vizier, Qamar-ud-Din Khan, who was the father-in-law of Yahya Khan. In April 1748, Ahmad Shah Abdali joined by Shah Nawaz Khan invaded the Indus River Valley, prompting Muradyab Khan Kalhoro the Subedar of Sindh to dispatch reinforcements to assist the Mughal Army along the river banks. Prince Ahmad and Qamar-ud-Din Khan, Hafiz Rahmat Khan, Safdarjung, Intizam-ud-Daula, Nasir Khan the former Subedar of Ghazni and Kabul, Yahya Khan and Ali Mohammed Khan were dispatched by Muhammad Shah to command a large army of 75,000 to confront the 12,000 advancing Durrani's. During the Battle of Manupur (1748), in Sirhind by the river Sutlej both forces fought a decisive battle and Prince Ahmad was nominally victorious after a Durrani wagon filled with gunpowder exploded, he was thereupon conferred with the title Bahadur. In spite of this victory, Muhammad Shah seriously mourned the fall of Qamaruddin Khan, who was killed during the battle by a stray artillery shell. After Ahmad Shah Durrani's retreat the Mughal aligned Khanate of Kalat, Nawab Amir of Bhawalpur remained aligned to Mughal Empire. Qamaruddin Khan's son Moin-ul-Mulk, (Mir Mannu) also a recognised war hero from the Battle of Manupur, was instituted as the Mughal Viceroy of Punjab, by the new Mughal Emperor Ahmad Shah Bahadur. Military innovations The Battle of Manupur had a considerable impact on the tactical prowess of Ahmad Shah Bahadur. When he became emperor, he is known to have introduced and organised the Purbiya camel corps particularly in the years 1751–54 to combat the invading Durranis and the rebellious Sikhs in the North-West regions of his empire. Succession The news of his confidant, Qamaruddin Khan's death during the Sirhind conflict (Battle of Manupur (1748)) led to Muhammad Shah's grave sickness and eventual death soon afterwards. Prince Ahmad ascended the throne on 18 April 1748 and was crowned on 28 April 1748 at Red Fort in Delhi. He assumed the title Abu Nasir Mujahid-ud-Din Ahmad Shah Ghazi. He appointed Safdarjung, the Nawab of Oudh, as Grand Vizier, Sayyid Salabat Khan the Kashmiri in-law of Farrukhsiyar as Mir Bakshi and Amir-ul-Umara, and Moin-ul-Mulk, the son of Qamaruddin Khan, as the governor of Punjab The main servant of the Mughal court, Javed Khan, was given the official title of Nawab Bahadur and an army