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1.The internal and external causes of the fall of the Gupta Empire were related. The main external factor was invasion and instability caused by nomad groups like the Hunas and the Hephthalites (White Huns) from Central Asia.
The Roman Empire fell to a alliance of Germanic tribes like the Visigoths and the Alans. Many other Germanic tribes where also the cause of the collapse of Rome.The Suebi â¦ and the Vandals were also one of them.2 people found this useful.he Roman Empire fell to a alliance of Germanic tribes like the Visigoths and the Alans. Many other Germanic tribes where also the cause of the collapse of Rome.