In the final winter of World War II, between October 1944 and January 1945, British forces in Italy supplemented their use of topographical maps by generating innovative ‘soil’ maps – used to predict cross-country trafficability and potential airfield construction sites. These assisted Allied troops advancing northwards across the valley of the Po: a major river that formed a natural obstacle to operational movement. Terrain assessment was aided in theatre by geologist Major J.V. Stephens and remotely by the (British) Inter-Service Topographical Department and the (American) Military Geology Unit of the US Geological Survey. ‘Soil’ maps at 1:250,000 were overprinted for Venice, Verona, Udine and Belluno areas after geological guidance; five maps for the Po region at 1:100,000 were drawn by Middle East Forces. Poor weather delayed the final Allied offensive in northern Italy until April 1945. Advance to victory was then rapid – across British and German thematic map areas.
Edward Rose (2026) studied this question.