Do note that the old tactic of sending a single suicide unit in front will not work anymore. The battle code was made more sophisticated, and after a certain amount of overkill the units will just bypass and charge the rest of your troops. Now, you can still, say, get half a dozen large high-armour low-weapon units to soak up the damage in front of your high-weapon low-armour infantry...But you have to have somewhere near the number of men as the cavalry you want to stop.