The War Department halt was an informal railway station on the Romney, Hythe and Dymchurch Railway in Kent, England. Over the 15 years that the station was open, its location is believed to have moved several times. Details are scarce as this was a secret military installation, but the end of the War Department branch line moved as building work (see below) moved onto new stages. When the installation closed in 1945 the railway company took over the line for freight shipment of ballast.