AIUI, orbital mechanics makes leaving weapons in orbit not very useful. One missile on the ground can launch a strike at any location within its range at any in

AIUI, orbital mechanics makes leaving weapons in orbit not very useful. One missile on the ground can launch a strike at any location within its range at any instant the operator chooses, and deliver it within ~30m or so. One weapon in orbit can only strike locations along its current orbit, and at very constrained times. To deorbit something, you generally need a retrograde burn while it's on the opposite side of the planet as the place you want it to deorbit at. So even if you happen to be in exactly the right place to strike a particular target at the time you make the decision to, you still have to wait half an orbit, or ~45min for LEO. The time just gets longer for the location not being perfect or for higher orbits.