Whoa romans really did advance quickly in those 150 years.

But look at this:
https://www.google.com/search?q=roman+legionnaire&es_sm=93&biw=1246&bih=622&source=lnms&tbm=isch&sa=X&ved=0CAYQ_AUoAWoVChMI3qDGnazrxgIVVi6ICh29jQQv

See?  I typed in roman legionnaire and got proper Romans.  What fabricated sources you get your byzantine fluffery with peacock feather wearing kings that look like they're from the year 11000, not the year 600 I do not know.