They will? I find the physics in that very unrealistic, i don't think two horses can break a wall, their mass, speed and strenght is not that big (IMO)
No, no, no, obviously the scythed chariots will be pulled by elephants so that they can go through walls. Incidentally, they'll also be amphibious.

Scythed Charioteer reenactor, someone?
I've always wanted to do this. Finding people to reenact the guys getting charged by the chariot might be a bit difficult though.