but... what would we need the legionnaires for anyway? none of them would have a clue what the roman's plans are, and when facing an army of 200,000 we are going to need all the troops we can get, even if they are just town militia

and you could probably tell if someone kills another person willingly or not, even something simple as slight hesitation could been seen... say if they kill the romans with ease and without stopping then they are obviously commited, but if they pause and think about it, maybe even close their eyes while taking the swing, you'll know they aren't committed to the cause