The Maratha Ditch was a three-mile-long[1] deep entrenchment constructed by the English East India Company around Fort William in Calcutta. It was built to protect the surrounding villages and forts from the Maratha Bargi raiders.[2][3][4][5] The ditch marked the outer limits of Calcutta city in the nineteenth century.[6][2]
^Acworth, Harry Arbuthnot (1894). Ballads of Marathas. Longmans, Green, and Company. Archived from the original on 8 April 2023. Retrieved 19 March 2023.