I have noticed a little bug, where if you select night battle during the "play it out/auto resolve/retreat" screen, and hit Esc to say, save it before the battle, that if you have a general, and the conditions are correct for the trait, you'll gain a point in it (i.e. BattleChivalry/Dread traits) and the process can be repeated to max out that trait line....

also i tried to use the search to see if its been brought up already, but to no avail, so if its already been mentioned, my bad