I wonder whether it's possible to fight wars without – ideally – having casaulties at all.
For example, sedating instead of killing. Afterwards prison camps or something like that. Admittedly, given the scale, it is financially and logistically a tremendous effort. But how much must a human life "be worth" in order to be spared?
There are other obvious issues like civil unrest, if the other party keeps killing soldiers of one's own military.
Still, it's better than to end lifes from my perspective. One side must be the bigger one.
We spend so much effort and resources into specialising how to kill each other. But we don't use that resources for finding alternative ways.
If there are people who really want to kill each other, throw them together and leave the rest alone.