User blog comment:Zippertrain85/Nords do trust magic/@comment-24568776-20140323163327/@comment-24568776-20140323220223

From what is said in-game it is likely there exist healers in the stormcloak army and battlemages in the imperial army, it is even likely that there are orsimer and breton soldiers fighting for the empire, we just don't see alot of things that in lore are suposed to happen.

Also if there are nord mages is likely they use frost magic, atleast from what we have seen from the draugr, but as i said i don't think they exist in enough numbers to fight toe to toe with altmer or other more magically inclined races.