It is common opinion that WWII was characterised by small and great air, land and sea battles. This is true, but it ignores the role played by installations of advanced technology for collecting information about the enemy intentions. The German support point La 318 Frosch (Frog) at Cap Fréhel (Plévenon) near Saint Malo (Brittany—FR) is one of the best examples. Built among precedent military and civilian French signal components, it hosted sophisticated surveillance components. The visits conducted on the site, permitted to identify La 318 components, to determine their preservation state at about eighty years from the end of the WWII and to proceed to the components reconstruction.
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