Well IMHO the thing that "they often talk about their past and various nation-altering events" is very important in this game... we'll probably be heavy on thematicness so one which would i.e. write nostalgic the fall of the glorious Ermorian Legions into the undeads he is leading and then facing those in battle... well...
Hey quantum, that's telepathy, I was preparing the image before you told that
PS: even the Agarthans are heavy on theme, and the water nations...