The story of the 16th Brigade, Railway Detachment is worthy of further investigation. It will require a detailed map of the area and the route of the railway at that time, similar to what one might have as a “Western Front Trench Map�. Without that, it would be difficult if not impossible to trace all the action. It is reported that Leon Trotsky himself spent most of the war on his own armoured train traversing Russia, assembling power and directing his troops (on-line reference). There are some web based maps that suggest that the required details may be available in the archives. For example, the following was extracted from the archives of the United States in the Great War (circa 1920):
The Murmansk Coast and Archangel, 1918 Educational Technology Clearinghouse University of South Florida Link to on-Line Map in PDF or Zoom