Iltutmish (1210-1236AD), son-in-law of Aibak, succeeded Aibak as the sultan by defeating Aibak's son. During his last years, Iltutmish nominated his daughter Raziya (1236-1239 AD) to the throne. In order to assert her claim, Raziya had to contend against her brothers as well as against powerful Turkish nobles. She successfully established law and order in her kingdom. In 1239 AD, an internal rebellion broke out in which Raziya was imprisoned and killed.
The struggle between the monarchy and Turkish chiefs continued till one of the Turkish chiefs Balban (Ulugh khan) (1265-1285 AD) ascended the throne. After Balban's death Jalaluddin Khilji, snatched the throne from Balban's weak successor.
Alauddin Khilji was attracted to Chitor because of Rani Padmini the beautiful wife of Rana Ratan Singh. Alauddin defeated the Rana, to gain Padmini. But by the time he reached Chitor, the queen had performed Jowhar.
Alauddin was an able adminstrator. He repelled the Mongol invasions successfully. He introduced price control. He banned drinking of intoxicants. To face water shortage in summer, he built many wells.
Kings followed in quick succession after his death. In 1320, Ghiyasuddin Tughlaq revolted and put an end to the Khilji dynasty.
One fine day, Muhammad-Bin-Tughlaq suddenly decided to shift the capital to Deogiri (Aurangabad). Not only the capital, but he also forced the entire Delhi civil population to migrate south. Old and sick people died during this march. After a short span of 17 years he rounded them up and marched them back to Delhi!
During his regin, in 1334 plague wiped out more than half his army. Seizing this opportunity, Pandyas and Kaktiyas rejected his sultanate. The great kingdoms of Vijayanagara and Bahamani kingdoms were founded.
The sultanate became weak and in 1398, the Mongols, under the leadership of Timur, mercilessly sacked Delhi. Timur returned to central Asia leaving his nominee to rule in the Punjab.