After downloading this mod, all units fight to the death (the morale still goes from eager to steady to shaken to wavering, but they don't rout as if they are in a plaza). They also have unlimited ammo.
I personally hate having this mod on as it feals like cheating and frankly takes all fun out of the game. It also makes battles take forever to win as you have to destroy every single enemy unit!
WARNING-THIS SEVERELY UNBALANCES THE GAME AND MAKES IT HORRIFYINGLY SIMPLE AND STUPID.
Don't be discouraged from downloading it just because I don't like it. It is funny to watch and knowing how many people cheat out there somebodys going to use it.