Again, I need to point out that this extreme example is hypothetical for the sake of discussion and I've established that it is not possible. I'd like to stay on topic so I'm not going to get deep into why I think this, I allude to my reasoning in my previous comment, but I disagree that war is authoritarianism. That isn't to say war is good.
Authoritarianism is my countries leaders trying to impose their will on me. War is some other countries leaders trying to impose their will on me. Not sure I like either option.