This map follows the 59th Field Company, Royal Engineers, the real British Expeditionary Force unit at the centre of Billy MacLeod MBE's novel "A Sapper's Story – 1940 – Retreat to Dunkirk." Markers cover the advance to the Dyle Line in Belgium, the demolitions and rearguard work of the long withdrawal, the famous Sapper counter-attack at the Ypres-Comines Canal, and the improvised engineering that made the Dunkirk evacuation possible.
Routes, dates and place names are drawn directly from the eleven campaign maps printed in the novel and its author-verified "Historical Note" chapter, cross-checked against public sources including Wikipedia and the Victoria Cross Society. Donnie MacIver, "Two Section," and their specific actions at each location are the novel's own fictional creation, set on real ground. The author is explicit throughout the Historical Note about which parts are documented history and which are invented detail placed inside real events.
Each milestone's sidebar includes a "history vs. fiction" note where the distinction matters, most notably at Gastuche, where the bridge demolition is fictional but the Victoria Cross action fought there by Second Lieutenant Richard Annand is entirely real, and at the Ypres-Comines Canal, where the Sapper counter-attack itself is documented history that the novel's characters take part in. A few locations (Gastuche, the Sonian Forest, the Ypres-Comines Canal stretch) use approximate coordinates where no precisely surveyed public location could be confirmed.