(1210--36)ILTUTMISH

 In 1210, died of injuries received in a fall from his horse while playing chaugan(polo). He was succeeded by Iltutmish ,his son - in -law .But before he could do so ,he had to fight and defeat the son of Aibak .Thus  the principle of heredity, of son succeeding his father ,was checked at the outset

iltutmish must be regarded as a real consolidator of the Turkeys conquests in north India. At the time of his accession, Ali Mardan Khan and had declared himself the king of Bengal and Bihar while Qubcha a fellow slave of Aibak, had declared himself an independent ruler of Multanand seized Lahore and parts of the Punjab. At first even some of iltutmish's fellow officer near Delhi were reluctant  to accept his authority. The Rajputs found an opportunity to assert their Independence. Thus kalinjar, Gwalior and the entire Eastern Rajasthan including Ajmer and Bayana threw off the Turkish Yoke.

During the early years of his region  Iltutmish's attention was concentrated on the Northwest. A new danger to his position arose with the conquest of Ghazni by khwarizm shah.  The khawarizmi  Empire was much powerful state in Centre is at this time ,and its Eastern Frontier now extented up to the Indus. In order to avert the danger ,Iltutmish marched to Lahore and occupied it . In 1218 the khwarizmi Empire was destroyed by the Mangolswho founded one of the strongest empire in history, which at its height extended from China to shores of Mediterranean sea and from the Caspian Sea to the river jaxartes. The dangerous it posed to India and its effects on the Delhi sultanate will be discussed in subsequent sections. While the mangoes were busy elsewhere, Iltutmish also ousted Qubacha from Multan and Uchch.The frontiers of Delhi Sultanate ,thus reached up to the Indus once again.

Secure in the west,  Iltutmish was able to turn his attention elsewhere. In Bengal and Bihar a person called Iwaz who had taken the title of Sultan Ghiyasudin, had assumed  Independence. He was a generous and able  ruler, and built many Public Work. While he made  raids on the  territories of his Neighbours ,the sena rulers of East Bengal and the Hindu rulers of Odisha andkamrup continued their sway.In 1226 -1227 Irwaz was defeated and killed in the bettle with Iltutmish's son near Lakhnauti. Bengal and Bihar passed under the Suzeraintyof  Delhi once again. But they were a difficult charge and repeatedly challenge the authority of Delhi.

At about the same time, Iltutmish took  steps to recover Gwalior and Bayana. Ajmer and Nagore remained under his control .He send expeditions against Ranthambhor and Jalore to reassert his Suzerainty . He also attacked Nagada, the capital of Mewar but had to beat a retreat at the arrival of Gujarat armies which had come to aid the Rana. As revenge Iltutmish dispatched an expedition against the  Chalukyas of Gujarat but it was repulsed with losses.