simple premise, but major consequences, lets say Rhomania survives in the Balkans and Anatolia and manages to secure much of Italy over the centuries (ala Issacs Empire). Eventually the Empire will have to reform its armies, is it possible that the infantry based system of warfare used by past versions of the Roman state would return? I was thinking of this mostly in the context of the rise of infantry during the 14th, 15th and 16th centuries, English, Spanish and Ottoman armies from the late medieval and early modern periods particularly spring to mind...