Quote Originally Posted by kekvitirae
Night battles are cute, but I have yet to see one where it's useful.
Two reasons, one more important than the other (you will have to guess which is what).
Firstly your enemy's troops suffer a small moralepenalty if you attack at night.
Secondly if you attack an enemy concentration of armies at night, only those that have the Trait can help the attacked army. Meaning you can single out enemy stacks and thus defeat the enemy in detail.