Khwaja Nizam-ud-Din Ahmad Bakshi was a Muslim historian of late medieval India. He was the son of Muhammad Muqim-i-Harawi. Nizamuddin Ahmad wrote the book Tabaqat-i-Akbari which is a general history of the Muslim rule in India coming down to the year of its composition.
Barani was a contemporary of Muhammad bin Tughlaq and Firuz Shah Tughlaq both. He wrote a number of renowned texts, such as the Fatwa-i-Jahandari, which elaborates on the principles to be followed by Muslim rulers to attain merit.
Alauddin Kalji introduced an innovative Chehra and Dagh System wherein the Chehra system involved the detailed description of each soldier and Dagh system involved branding of horses. Strict review of the army from time totime was carried out.
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