I imagine, that this space warfare as described in article will only be preceding the real war. once this unmanned missiles are exhausted . if invading force ha

I imagine, that this space warfare as described in article will only be preceding the real war. once this unmanned missiles are exhausted . if invading force has won. it will try to land on the resource that it is fought for, (planet, moon, asteroid, space station). and once they are landed it will be more classical warfare. (so don't worry there will still be blood). so this is very much like trench warfare. All this is valid for current technology . and same species war (humans vs humans) , but war between aliens and humans will most likely be war between Von Neumann probes. if you lose you got terraformed or planetXformed. all will be very quick and precalculated. so if you are not prepared in advance for all possible situations. you will probably lose. (or not be able to terraform). pretty much all you can do to protect you r self from alien Von Neumann probes is find it first in space or early stages of development and try to reverse engineer it.