Is There a Future Without Humans?

Could one army of robots fighting another army of robots ever decide a war? All the time come where a war is completely decided without humans entering battle or conflict or violence. I think not in the world that we're currently imagining, but if it's nation state wars, there have to be human casualties involved. That is what forces a nation state to capitulate. So I feel like there are always going to be humans involved even if their only involvement is as a body count to make one side say "We're surrendering now"