Um, my nord had a healing spell right away at the start of the game.
Well, the fact your nord had one doesn't mean everyone in the whole world has one really.
Also, why didn't they just use an imperial battle mage or better yet wait for their health to regen. Considering how easy it is to heal yourself in Skyrim it just looks silly to put injured soldiers anywhere. They would have been better off having a row of dead soldiers covered up outside the camp waiting for burial. That would have been plausible.
That's nothing. The real issue was when I used my expert Restoration with 90% + reduction in spell costs and spend a full magicka bar on one of those soldiers and they were still moaning in pain as if I did nothing. Guys, I did enough healing to reattach a dozen torn limbs! What the hell did happen to you that you are still suffering after all that?