The Chattenden and Upnor Railway was a narrow gauge railway serving the military barracks and depot at Upnor, Kent and associated munitions and training depots. It started life in the early 1870s as a standard-gauge railway. The 2 ft 6 in narrow gauge working began in 1885, initially in a mixed gauge formation with the standard gauge, and post circa 1903 2 ft. 6 in. gauge exclusively. In the latter form the line continued in use until the end of 1961.

Chattenden and Lodge Hill Military Camps were British Army training camps in Chattenden and Hoo St Werburgh in Kent. They were built as ordnance depots and functioned as such through to the second half of the twentieth century.