[jr2]

You get to fly against them in a testing missino right as the Shivans first appear in the FS2 main campaign.  EDIT: And again, in a Spec Ops mission to scan the Sathanas' systems, after it first appears.

[TrashMan]

ERm...that's a Ptah.

[Jeff Vader]

You get to fly against them in a testing missino right as the Shivans first appear in the FS2 main campaign.

A what? The Shivans had been around for quite some time, concidering that you encounter them in the fourth mission in the campaign.

And again, in a Spec Ops mission to scan the Sathanas' systems, after it first appears.

That'd be the Ptah, like Trash said. And it was during the officer exchange thingie. The SCO twits didn't go scanning the Sath.

[Asuko]

Ah, my bad. I generalized. Thanks anyway for clearing that up.