 The Ordnance Factories Board of the Ministry of Defence, the Garden Reach Shipbuilders & Engineers and the Eastern Command of the Indian Army are all headquartered in the city. The U.S Consulate in Calcutta is the US Department of State's second oldest Consulate and dates from 19 November 1792. The Consulate General serves the states of Bihar, Jharkhand, Odisha, West Bengal, Sikkim, Assam, Meghalaya, Tripura, Mizoram, Manipur, Nagaland and Arunachal Pradesh.
