Check this out!
The death knights apparently joined the side of nords in the battle and the swadian will be slaughtered of course.
I think the engine is to blame: the knights just wanted to attack someone but a battle is only 2 sided so they had to side with someone and they sided with the strongest.
Anyway, this kind of behaviour can have unforseen consequences and some of them may count a lot in the game so try to fix this if possible.

I think the engine is to blame: the knights just wanted to attack someone but a battle is only 2 sided so they had to side with someone and they sided with the strongest.
Anyway, this kind of behaviour can have unforseen consequences and some of them may count a lot in the game so try to fix this if possible.