Question

what was the impact of the mongol on delhi sultanate

Answer 1

The Delhi sultanate was under constant threats from Mongols. To protect Delhi from the attacks of mongols, the sultans in Delhi had to take some serious measures such as constructing a huge army, feed them, construct cantonments which was quite expensive. Alauddin Khalji was however successful in protecting Delhi from the attack of Mughals. 

Answer 2

This forced the two ruler to mobilise a large standing army in Delhi which posed administrative challenge