Im not trying to suger coat it, more like coat it in salt to cover the taste of shit (cos lets face it, getting pretty much wiped out, would be shit). We would get a proper battering, but it wouldn't be the completely one sided thing that you guys keep saying about.
Besides, we need to be focusing on the Gregory House deffense......
oh, it would be one sided, your own plan (the nuclear one) would cause a back blast that would destroy/ion blast all our satellites in space.
No Satellite surveillance
We would be screwed. All our advanced tech we got. Gone. Fighter jets..... lolz... unless we re activate out old Radar Bases their done. all of our defense systems, designed to stop missiles do jack shit against a laser beam.
Flak Armour will stop a 5.56mm bullet, even 40k autoguns are basically more high tech then current weaponry we issue troops which have an AP of -. Our armour will not stop a single las beam.
Earth VS. Imperium.
Major Resistance: 3-6 months
Minor Resistance (terror cells, militias, roving bands, Americans with guns):
The reason for short minor Resistance: unlike standard Earth Forces, Imperial forces can and will murder whole towns for reprisal, sure killing will make them more pissed off, but when you have not the threat of a soldier killing you and our family, you have the threat of a freaking laser beam coming out of the sky and destroying your whole freaking town and then flamethrower squads coming in aftewards to clean up... yeah.... we're fucked.