World War II
Nazi U-Boats Tracked Allied Convoys by Their Soap
A British scientist realized in 1943 that the Nazis were tracking Allied convoys by their soap.
Read the full story in the app
Untold Archives: one untold history story, every morning.
Download on the App StoreWorld War IIAtlantic OceanNaval WarfareBritainEspionageScience at War20th CenturyLogistics
History is full of stories like this one.