The fall of the roman military power

[L.Valerius Gaudentius]

Besides, the barbarian tribes gets stronger and stronger, for example, the Huns mounted archers were a revolution unity in that time that was almost unknown in the Roman World.

Was it that novel? Didn't Marcus Licinius Crassus face an army of horse archers at Carrhae? The Parthians and Sassanids had horse archers. The Romans, too, had equites sagittarii.

I think the main threat from the Huns came with the leadership of Attila, who brought together a consortium of barbarian peoples, of which the Huns were only a part. Before Attila, the Huns were a lesser threat and were almost no threat after Attila.

But the Huns mounted archers were faster than the Parthians or the Sassanids. Besides, they were able to attack their enemy and escape without any damage. Their attack is more destructive than the others (like Parthians or Sassanids).