"Visual Evidence for Roman Infantry Tactics"...

[Lysandros]

is a paper uploaded by Michael Taylor here: https://www.academia.edu/3394799/Vis...fantry_Tactics. I haven't read it myself yet in detail, but as it deals with unit formation (and his sources indicate he's talking about EB timeline, too), I thought perhaps it might be even useful for modelling units, unit cohesions or animations. But some people might be interested in that topic anyway...