Explanation:

Muhammad Ghori conquered Haryana after the Second Battle of Tarain. Following his death, the Delhi Sultanate was established that ruled much of India for several centuries. The earliest reference to 'Hariana' occurs in a Sanskrit inscription of rigvedic period dated 1328 AD kept in Delhi Museum, which refers to this region as The heaven on earth, indicating that it was fertile and relatively peaceful at that time. Firoz Shah Tughlaq established a fort at Hisar in 1354 to further fortify the region, and also constructed canals or rajwahas as they were referred to in the Indo-Persian historical texts.