I was shocked to find the teachers and textbooks refer to this as The War of Northern Aggression.
I've heard that several times, and I'm suprised to learn that you hadn't. I use the term Civil war, though, and only see War of Northern Aggression in books and on tv, like with a Rocky and Bullwinkle show where they use Civil War battle plans for a football game, and this southern guy insists on his usage.
I'll ask my aunt about this, sometime.