Ala-ud-din was the second ruler of the Khilji dynasty of the Delhi Sultanate (the combined period of five dynasties from 1206 to 1526). He succeeded to the throne in 1296 by killing his uncle and father-in-law Jalal-ud-din Firuz, who founded the Khilji Dynasty in 1290 by murdering Kaiquabad, the last ruler of the Ilabari Dynasty, known more popularly as the Slave Dynasty.
Ala-ud-din was an imperialist. With his accession begins, as Sir Wolsely Haig says, “the imperial period of the Sultanate”. During the time of Ala-ud-din, Ranthambhore was ruled by the chivalrous Rajput chief Hamir Deva. An expedition sent by the Sultan in 1299 met with only limited success. The Rajputs could not be subdued completely. So Ala-ud-din himself marched to Ranthambhore and captured it in 1301. Hamir Deva was put to death. Ranmal, the minster who betrayed his master Hamir, was also killed by Ala-ud-din’s order. However according to Hammir Mahakakavya, Hamir Deva cut off his head with his own sword when he realized that he had been betrayed by his two generals Ratipala and Krishnapala, and his end was near.