Okay, I'm going to look a bit more into it before I reject the most literal translation though - the literal german translation is Saxon Fratricidal War and makes sense in this case, so I'd rather err towards this.  It's not exactly a civil war, is it?  Can we define it that way, I'm not sure?  I'll keep looking into it as I think the literal translation is best, at least for right now until we search a bit more.