When did the Roman Empire fall (your thoughts)?

[starman2012]

The HRE was surrounded by impish princelings who would surely have been gobbled up by the Moors in the West or later the Turks in the East had it not existed.

But Tours 732 CE preceded the HRE and the Eastern Empire did the job of containing turks down to mid 15th century. Western intervention just prior to 1453 e.g. in 1444, was ineffective.