[mac5732]

The police unit sounds interesting, how about, if you make this a "facility" that can only be built on either the empire capitol and/or regional captiols? This way you would have to build and transport them to which ever world is in possible rebellion mode. This would make it possible for some planets to rebel, otherwise all you have to do is build police on every planet. Also they could act like troops except that they would only have the physical strength or combat strength of say 60-70% of combat units. They would be para-military police, but not as strong as regular military type units. So they could restore civil order and still give somewhat combat to invasions.

just some ideas mac