Did anything happen in naples leading up to the fall of the roman empire?

There is a surprising lack of evidence of any kind of Skirmish near the Bay of Naples at the time (470-476 AD) which would seem to imply the Franks walked in almost completely unopposed. Maybe I'm missing something but I can't help but think such a critical location should've had more defense even if the empire was stretched at the time.
Asked May 06, 2016

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