Just skimming through the ideas and saw something about being wary of ambushes...

Would it be possible to make the wary of ambushes trait say something like "An army under the command of this man has been ambushed in the past and it has obviously affected him since he now refuses to even march through woodland" And you won't be able to march through woodland with the general... Obviously he would only get this trait if he is ambushed and loses the battle but i think it could be a good idea, if it were possible.