Manipulating BattleChivalry and BattleDread

[ReiseReise]

Also

66% chance for winning with odds <.5, probably easiest to get defending a siege, just make sure he fights.

33% for catholic or orthodox fighting muslims, win or lose.

66% for muslims fighting catholics (but not orthodox), win or lose.

and finally the one I would love to see actually happen...
odds <.95
get an average victory or better by killing <20% of the enemy.
How you are supposed to rout them with odds in their favor (so you can't outnumber them and flank/scare them away) and without any of them dying is beyond me. Maybe if you had your general and 2-3 peasants, and they had about 7 units of peasants, the odds might be equal and you could hold all the peasants while the general quickly flanked them and half-charged their captain a couple times to hopefully kill the captain without annihilating the entire unit. You would also have to make sure you killed 19% of them or else you might just get a Close Victory instead of Average Victory.