-joe-
Technically, at the most fundamental level, the objective of war is to change behavior.
It might be that one entity wants another entity to stop defending their oil wells so the first entity can have those resources for themselves. Or it might be that one entity wants the other to give up their current political system. But it’s not really about killing and blow stuff up. That’s just the mechanism by which the behavior is modified.
Just being a nit-picky engineer again…
-joe-