Me and a friend actually made a campaign long, long ago where you played a Russian Engineer, and it was a nearly civilian type thing. Most of the missions just involved going around in war-torn parts of the islands, fixing things up and the like.
The Finns then attacked your own base, which was the only time that there was combat. That's not to say that there weren't battles going on elsewhere, it had a pretty good ending to the campaign, where you saw your family and friends taken out of your house by the finns and then shot, and you were stuck at the end of your street in a car, with no way to change it.
It had voices and everything, but I got a new PC and he had to wipe his hard-drive, so no copies remain