There are the good guys, and there are the bad guys. Both groups are named. Now you would expect these names to be diverse, right? Nope. If one name is an acronym, the other is too. If one name is one word, the other is too. If one is referred to thematically (such as by color, e.g. "the Reds"), the other's name will match it ("the Blues"). This is Unified Naming System. This seems weird but is probably the best way to express there's something between those two. The more cynical could also say that the reason for this is the author's lack of imagination.