You had better hope to God that this is fiction.
The invaders have not yet shown their hand since the insurgency has yet to
notify them that all is well and that they may waltz right in and set up
permanent residence as the new overlords.
All that remains is a few more military-base closures in strategic areas, a
few more troops deployed overseas, a little more downsizing of the standing
army coupled with constant "re-invention" in slow pace along unworkable
antiquated or forward-looking maladaptive models, a little more
Federalization of State Guards, a little more dismemberment of citizen's
militias, a little more bureaucratization of the police departments and
hamstringing of elected sheriff's departments, and invasion will be a simple
taks, and indeed, some say, imminent.
The invaders are not to be confused with the illegal popular migration of
war-criminals and the lackeys of overthrown former Communist regimes and
insurgencies from Central America.