In plane field , how would a fight beetween roman legions and hellenistic phalanxes go ?
Well, I think Cynoscephalae and Beneventum are good examples of how that goes. Pyrrhus showed the Romans that the phalangite army was no small trifle, but to the Romans eternal credit (and one of the reasons why Rome lasted as long as they did) was that Rome learned from their mistakes.
Thanks for the question, Anon.
SomethingLikeALawyer, Hand of the King