New Player - Warp Raid and CPA logic?

[x4000]

If I clear EVERYTHING except the OCS, there can never be border aggression on that planet right?

Hmmm... I don't know about that.  It probably could still happen in some circumstances, but I have not done the math.  Border aggression is sort of like an overflow valve, all sorts of things can trigger it.  But in your case, sounds like some ships that had retreated came back through here and are now queuing up, which can also happen.

[Mithror]

Wow, that's crazy -- generally those are not meant to be cleared!  But, in that case, sounds like it's border aggression, like Moonshine Fox said.

OR -- it's possible that some AI ships retreated at one point, and then gathered in that planet.  If AI ships are overmatched on one of your planets, they will retreat out into the AI planets, and then come back at you from some various direction.  If there is a way for them to get to this planet after having retreated, then they could be stalking you based on waiting to come back in.

Come to that, they could actually have retreated to that planet, even if it was a dead end, and are thus stalking you from there because they had nowhere else to go once they reached that planet!

It's probably the latter then

It seems a bit too early for BA to have kicked in, I believe.

[x4000]

Probably so, yes.