Who founded the so-called Slave Dynasty of India:

A Mamluk, literally meaning owned, was a soldier of slave origin who had converted to Islam. The phenomenon started in the 9th century and gradually the Mamluks became a powerful military caste in various Muslim societies. Mamluks held political and military power most notably in Egypt, but also in the Levant, Iraq, and India.

In 1206, Muhammad of Ghor, Sultan of the Ghurid Empire, was assassinated. Since he had no children, his empire split into minor sultanates led by his former Mamluk generals. Taj-ud-Din Yildoz became the ruler of Ghazni, Muhammad bin Bakhtiyar Khilji got Bengal and Nasir-ud-Din Qabacha became the sultan of Multan. Qutb ud-Din Aibak became the sultan of Delhi, and that was the beginning of the Slave dynasty.