India - Early Sultans, Turkish Rule, Subcontinent: When Quṭb al-Dīn Aybak assumed authority over the Ghūrid possessions in India, he moved from the neighbourhood of Delhi to Lahore. There he set up guard against another of Muḥammad of Ghūr’s slaves, Tāj al-Dīn Yildiz of Ghazna, who also claimed his former master’s Indian possessions. In 1208 Quṭb al-Dīn defeated his rival and captured Ghazna but soon was driven out again. He died in 1210 in a polo accident, having made no effort to extend his Indian conquests, but he had managed to establish the foundation of an Indian Muslim state. Quṭb al-Dīn was the first ruler in what