Quote Originally Posted by Ludens
Actually, the charge bonus has a quite minor effect on the killing-power of a charge. That is what the whole charge-bug is about. Basically, it seems that the charge bonus is actually determined by the armour bonus (for the most part), while mass determines how far and how fast a charging soldier will drive into an enemy formation (provided he doesn't get killed).
that's weird.
i tested it liek this:
i ahd a levy-pikemen and a companion. they a levy pikemen.
phalanx head on to phalanx. and i charged from side and back. at the side i killed aprox 20 people with teh cav. at the back 35 at most.

same scenario, this time is made the charge bonus 30 (export_descr_unit)
and now i killed 30 form teh side, and 50 at teh back..

my guess is that charge-bonus is a bonus to attack-power when charging.
i guess penetration-power of a charge is then measured by mass(or defense..)