Iitutmish , the Sultan of Delhi, was contemporary of Mongol leader Chengiz Khan. In 1221 A.D., there was a danger of expected attack of Chengiz khan on Delhi.
Khwaja Abu Malik Isami is the author of Futuh-al-Salatin is yet another elaborate account of the Delhi Sultanate. It consists of almost 12,000 verses. The Futuh-us-Salatin is a history of Muslim rule in India until 1349-50.
Iqta was introduced by Delhi sultan Iltutmish while Jagir was introduced by Mughals . Under Iqta system , the land of the empire was divided into several large and small tracts called Iqta and assigned these Iqta to his soldiers , officers and nobles.
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