David and Goliath
Escalation from Sansha Outpost and Sansha Military Complex.
Part 1
Going through the logs from one of the command ships you blasted, you come across a recent memo containing a draft for a plan where forces from this Military Complex and another similar to this one were to gang up and raid a space trucker station somewhere in the region. Where this space trucker station is, is not included in the logs, but the location of the rally point is there. It is supposed to be by a small asteroid belt, not too far away.
Step one of the escalation drops you into ~8-10 BC/elite cruisers (all within 10km), so bring a decent tank.
Part 2
From the wreckage of this ship, you get info on where it is from, it is another Sansha station. Well, more an outpost than a station perhaps, but it is a pure military outfit, not a regular colony.