Explanation:

In 1740, the Maratha forces, under Raghoji Bhosale, came down upon Arcot and defeated the Nawab of Arcot, Dost Ali, in the pass at Damalcherry. In the war that followed, Dost Ali, one of his sons Hasan Ali, and a number of other prominent persons lost their lives. This initial success at once enhanced Maratha prestige in the south.