How can you EARN a night battle general's trait?

[WhiskeyGhost]

mmkay, i recall my theory back, and thank you for confirming its innacuracy =P

[Zarky]

It´s if you´re forced to fight night battle (which AI doesn´t do...), or you´re born with it, or have enough command stars to battle at night, im not sure if it comes when you get 5 stars or if you need to fight at night first.

[Kaidonni]

It's usually when you get 5 stars tallied in the command section next to your general's portrait. It can't be 3 stars with +2 when attacking, for example, though. It must be 5 or more command stars at all times, not just in a specific situation.

Then, of course, there are the other things, being forced to fight at night and being born with it. I haven't ever had either of those, though, so I can't say anything there.

[Thurak]

It´s if you´re forced to fight night battle (which AI doesn´t do...)

I saw that yesterday. Two stacks of Mongols attacking Antioch decided to do that at night so my reinforcement army was not able to fight.
But I must admit that the AI rarely chooses to fight at night.