High Imperial Roman army vs Late Roman army

[Robert Vermaat]

I would vote for the roman army of the Principate because the roman armies of the late antiquity were only roman army in name.

I strongly disagree with that. The armies of the Principate were full of recruits from the provinces, and the auxilia was for 100% made up from non-citizens. The myth that Roman armies of Late Antiquity were full of barbarians has already been dispelled well and good.