Answer:
The most important 3 causes are assassinations,military problems like armor and conscription, and natural disasters. I think that because because assassination the governor led to so many governors you didn't know what to do, then the military problems there were very little people and they asked the governor to remove their protection like their breastplates and helmets and then the natural disaster killed some of the people and slowly there there was a fall of the Roman empire.
Explanation:
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