Kanpur Cantonment (popularly referred to as Kanpur Cantt) is the largest cantonment in India which is a military cantonment in Kanpur, Uttar Pradesh, India,The Kanpur Cantonment was established in the year 1811 and is situated on the right bank of river Ganges and is bound by Kanpur city area on the remaining three sides. The area of the Cantonment is approx. 4243.0084 acres. (17 km2.) out of which the Bungalow Area is 3899.1784 acres and the Civil Area is 334.83 acres.

Ssource: https://en.wikipedia.org/wiki/Kanpur_Cantonment