In large-scale war, it is almost always the case that the majority of deaths come from accidents, friendly fire, starvation, and infection (i.e. non-combat deaths). So that will be nothing new.

I don't know your age or where you are located but if it actually does come to a WW3 level conflict, there's a decent chance they try to force you into serving. You gonna go? Sit it out in prison for refusing? Flee into the woods and survive on squirrels and berries?