Spectre gunship

"Clear for engagement!"

- Spectre

The Spectre Gunship could be periodically deployed by particularly high-ranking US generals. An enormous rocket-powered swing-wing super-plane, the Spectre tore across the skies towards its designated target area, before unleashing a barrage of fire from a battery of miniguns and artillery cannons. The Gunship moved so fast towards its target that it could not be hit by enemy fire. Upon reaching the target area, the Spectre would slow down considerably and fly in a tight circle. Within this circle, commanders could designate a specific area to be targeted, and change this on-the-fly.

Upon running out of ammunition, the Spectre would return to base with its wings swept back once again. For most generals, only the first rank of Spectre Gunship attack was available, loaded with the least amount of ammo. However, for General Alexander and General Granger, two further ranks were available, increasing the amount of time the Spectre was able to remain attacking. The maximum amount of time a single Spectre could be on-station for, provided it didn't get shot down, was an impressive one minute. however given the nature of this, almost anything would likely be utterly slaughtered if under that assault for too long.

The Spectre could lay waste to any unit in its sights, and could bring down the majority of buildings. Although it could be shot down while attacking, the Spectre was extremely tough, particularly if equipped with countermeasures.

Behind the scenes
It is very similar to the Harbinger Gunship, the difference is that while you can build an Harbinger from an airfield and directly command it, the Spectre Gunship could only be periodically deployed and cannot be commanded fully.

The real life counterpart for this unit is this