Operation Chariot succeeded because it was unthinkable
Eighty years ago, just after midnight on 28 March 1942, the British destroyer HMS Campbeltown crept up the estuary of the River Loire towards the heavily defended port of St Nazaire. Here lay an immense dry dock, the only facility on the west coast of France that German battleships such as the ferocious Tirpitz could
Source: spectator.co.uk