 The next year, he captured the fort of Mandore, also in present-day Rajasthan.Meanwhile, in eastern India, Ghiyasuddin re-asserted his independence and occupied Bihar.In 1227, Iltutmish directed his son Nasiruddin Mahmud, who held the iqta' of neighbouring Awadh region at this time, to invade Bengal while Ghiyasuddin was away on a plundering campaign in Kamrup.