(Seeing WarWorld approaching) Why would he come here? And why now? Open a sub-space channel. Attention, I am an ambassador of the Reach, and claim the Earth as property of the Reach under Guardian treaty. You are therefore breaching Reach territory. Reverse course.
But I am uninterested in negotiations. The Earth under the Reach's thumb is far too great a threat to my long-term plans. It must be destroyed. And, quite frankly, if you knew what you were in for with the Reach, you'd thank me for putting you out of your collective misery.
Don't you understand? Your deaths today in the face of the Reach are a mercy. My grand laser emitter would've ended your world in a matter of minutes. Another mercy. But it seems the mercies of Mongul are not appreciated. So we will do this the hard way, and the WarWorld will unleash all it's weapons upon the Earth. You're welcome.
Then, to protect the Reach's investment...mobilize the fleet. (The Reach warships rise from the ocean, and several are destroyed before they reach low orbit.)