Did the French or Italian navies adopt Hedgehog and related anti-submarine weapons during the Second World War?
Short answerNot to a significant wartime extent in this account; access expanded just after the war as NATO formed and members prepared for the emerging Soviet submarine threat.
NotesThe answer moves the important transition into the early postwar period. French and Italian forces began gaining access to these anti-submarine systems as NATO cooperation developed. The emerging Soviet threat supplied a common operational reason to standardize and share equipment. This timing matters because later Cold War capability should not be projected backward into their wartime destroyer doctrine. The watch point separates alliance-driven postwar modernization from Second World War practice.