I would say both scenarios deserve a trait.

Yes there should be a trait if you retreat from the field of battle constantly and minimize casualties.



Then again there should also be a trait for if every single battle you sacrifice every man standing for pointless small villages and mines in the middle of no where.

Bloodlust or something similiar sounding.



I am hoping the general are more personalized this time around. So when you see them you can be like, "Oh no not that guy again, urban warefare time"