I think, Craft, that they just aren't sure how they think they are going to invade. There isn't anything the planet can do until the invaders start their attack.
Vera-Kin, her lightsaber already in hand, ignites it as she moves quickly toward the sound of the BV-50's laser. She arrives shortly after the nimble Vlad and shields her eyes from the flash of the cut power flow.
"Time, it is, to end this," Vera-Kin says, "before it begins."
Sorry, was absolutely exhausted when I posted last night, brain was on the fritz. Ignore those last posts.
I was just assuming that the landing craft was already approaching the planet, getting ready for when the shield drops. Pretty much wondering, since it seems an invasion is imminent, why the Aluran's don't use their defense network to take out the landing craft now.