Signals-Communications Maps

Army area map no. 10 : Watten Bridge Head - Merckeghem Switch - St. Omer - Sercus Line, signal communications

Marœuil

[Second] Army area map, no. 6 : Army route plan, 12-8-18

[Ypres Region, 3rd Battle of Ypres : trench map; airline & cable routes map]

[Ypres Salient 1917-1918, light railways and signals]