Roman Legionaries Vs. Medieval Heavy infantry

[Gluteus Maximus]

When you say to use your quote "the Empire DID remain" we are talking of the Eastern part?But "their territory and tax base remained intact" only for a short period.

Yes, I do mean the Eastern bit - from the point of view of everyone in 476, the extinction of the Western half officially reunited the empire. I believe that their tax base and territory survived from that date until 1071... quite a long time, although I accept that the rise of Islam and the loss of Egypt/middle east put a dent in it. It is interesting what you said about a dominate period army wargaming favourably against late medieval foot!