Qutbuddin Aibak's conquests (c. 1200-10) included Gwalior, parts of Bundelkhand, Ajmer, Ranthambhor, Anhilwara as well as parts of U.P. and Malwa. In… - Qutb-ud-din Aibak

For instance, when Muhammad Ghauri and Qutbuddin Aibak mounted a combined attack on the Khokhars of the Salt Range (Koh-i-Jud), “great plunder was taken and many captives, so that five Hindu [Khokhars] captives could be bought for a dinar”. Captives were so plentiful that they were also sent “to sell in Khurasan, not long after.”

In 1195 when Raja Bhim was attacked by Aibak 20,000 slaves were captured, and 50,000 at Kalinjar in 1202. “The temples were converted into mosques,” writes Hasan Nizami, “and the voices of the summoners to prayer ascended to the highest heavens, and the very name of idolatry was annihilated.”... Farishtah specifically mentions that during the capture of Kalinjar “fifty thousand kaniz va ghulam, having suffered slavery, were rewarded with the honour of Islam.” Thus enslavement resulted in conversion and conversion in accelerated growth of Muslim population.

[Qutub-ud-din Aibak] was a typical specimen of the ferocious Central Asian warriors of the time, merciless and fanatical. His valour and profuse liberality to his comrades endeared him to the bloodthirsty historian of his age, who praises him as having been a ' beneficent and victorious monarch. …His gifts were bestowed by hundreds of thousands, and his slaughters likewise were by hundreds of thousands. All the leaders in the Muslim conquest of Hindostan similarly rejoice in committing wholesale massacres of Hindu idolaters, armed or unarmed.