Not so Elfwine,the west of the 5th century was no longer Roman.Where was all these army?Aetius was scrapping the bottom of the barrel to stop the Huns and had to ally with the Visigoths to have some hope of chance...the empire in the west was to all practical purposes Italy.
I'm not sure which is the case here:
1) You didn't read my post, which specifically is about the Western army/armies before the fifth century (and thus before Aetius or Atillia).
2) You're arguing that the army collapsed before the 5th century.