MANDASOR, or MANDSAUR  , a town of Central India, in the native state of Gwalior, on the Rajputana railway, 31 M . S. of Neemuch . Pop . (1901), 20,936 . It gave its name to the treaty with Holkar, which concluded the Mahratta-Pindari War in 1818 . It is a centre of the Malwa opium trade . Mandasor and its neighbourhood are full of archaeological interest . An inscription discovered near the town indicated the erection of a temple of the sun in 437, and at Sondani are two great monolith pillars recording a victory of Yasodharma, king of Malwa, in 528 . The fort dates from the 14th and 15th centuries . Hindu and Jain remains are numerous, though the town is now entirely Mahommedan .