After the death of Nader Shah in 1747, Ahmad Shah Durrani had returned to Kandahar with a contingent of 4,000 Pashtuns. the Abdalis had "unanimously accepted" Ahmad Shah as their new leader. With his acension in 1747, Ahmad Shah had led multiple campaigns against the Mughal Empire, Maratha Empire, and then receding, Afsharid Empire. Ahmad Shah had captured Kabul and Peshawar from the Mughal appointed governor, Nasir Khan. Ahmad Shah had then conquered Herat in 1750, and had also captured Kashmir in 1752. Ahmad Shah had launched two campaigns into Khorasan, (1750–1751) and (1754–1755). His first campaign had seen the siege of Mashhad, however he was forced to retreat after 4 months. In November 1750, he moved to siege Nishapur, however he was unable to capture the city and was forced to retreat in early 1751. Ahmad Shah returned in 1754, he captured Tun, and on 23 July, he sieged Mashhad once again. Mashhad had fallen on 2 December, however Shah rokh was reappointed in 1755. He was forced to give up Torshiz, Bakharz, Jam, Khaf, and Turbat-e Haidari to the Afghans. Following this, Ahmad Shah had sieged Nishapur once again, and captured it.