Does anyone want to know what Real space warfare will be?

Ignoring CoaDE's premise and looking at the real world as of right now: there's not currently mining or manufacturing or trade infrastructure in space, so spaceborn strategic targets would be communication and navigational and surveillance satellites. Those are thing's that have no point defenses, limited maneuvering deltaV, no sensors to detect incoming threats, and are unarmored or at most wipple shielded against micro meteors. Their best defense is the fact that they are over 100km off the ground and moving at a bit less then 8km/s. You don't have to build a giant space battleship to fight that war, if you can reach the target at all it really doesn't take much.

That's a really boring answer, so in CoaDE's context most of the solar system has mining colonies and trade infrastructure, and also the Earth is uninhabitable. So the next questions are something like well how much infrastructure, and how are they defended. All of which is to say that everything is speculative conjecture based on at least some assumptions and hypothetical fiction. You can engineer real solutions to hypothetical problems, but if you're trying to figure out what a "real" space war would look like you have to craft a fictitious premise first.