Interesting account. Thanks for posting.
The closing sentence about Romans voluntarily defecting to the Huns reminded me of a Roman history course from my undergraduate days. When the timeline got to the Byzantine period, there was significant discussion of the heavy taxation of freemen by the state. I particularly remember two items:
1. Freemen were actually going to wealthy landowners and asking to be enslaved because their tax burdens would be lighter.
(There was also a period of depopulation throughout the Roman Empire where extensive areas, once under cultivation, were allowed to become overgrown.)
2. That Byzantine rule was so abusive and heavy-handed for cities in Mesopotamia and Persia that Muslim armies were often welcomed as liberators.
That is about to happen here.