[@Willy Vereb] You actually make excellent points, and I will concede that you know more about this than I, and I haven't put a lot of thought into this, which I intend to rectify. So if my plan is Swiss cheese, I'm not surprised.

I am however, reluctant to use nukes because of their connotations, and wonder what you could suggest as an alternative to an easily interceptable weapon like a "Rod from God" and a weapon like a fusion warhead (and I am aware of fusion's lack of fallout) with the connotations it carries.

I was actually thinking spaceship batteries, but again, I haven't been able to put too much thought into military matters.