Alaud-Dīn Khaljī, born Ali Gurshasp, was an emperor of the Khalji dynasty that ruled the Delhi Sultanate in the Indian subcontinent. Alauddin instituted a number of significant administrative changes, related to revenues, price controls, and society.
Alauddin was a nephew and a son-in-law of his predecessor Jalaluddin. When Jalaluddin became the Sultan of Delhi after deposing the Mamluks, Alauddin was given the position of Amir-i-Tuzuk. Alauddin obtained the governorship of Kara in 1291 after suppressing a revolt against Jalaluddin, and the governorship of Awadh in 1296 after a profitable raid on Bhilsa. In 1296, Alauddin raided Devagiri, and acquired loot to stage a successful revolt against Jalaluddin. After killing Jalaluddin, he consolidated his power in Delhi, and subjugated Jalaluddin's sons in Multan.
Over the next few years, Alauddin successfully fended off the Mongol invasions from the Chagatai Khanate, at Jaran-Manjur, Sivistan, Kili, Delhi, and Amroha. In 1306, his forces achieved a decisive victory against the Mongols near the Ravi riverbank, and later ransacked the Mongol territories in present-day Afghanistan.