You can't retreat a faction from their native system. As much as some people would like that to be the case. It'd help clear up all the abandoned PMFs from groups that dumped a faction on the map with (in some cases) a poorly-written description when you select their home system, then stopped playing and left their perfectly good system cluttered. It wouldn't be so bad if not for the fact that some of them are genuinely really nice systems for a home base, and their presence means that new player groups can't put their faction there.Can you actually wipe out a faction from a system? Like, not just send it into retreat, but literally kill it off?
Obviously I know you can help a faction take over other systems, but I don't know if it's some sort of "one in, one out" arrangement, or what.
I'll not lie though - I'm much more of a tactical level, as opposed to strategic level, player. I'll gladly own that about myself. Just tell me who needs to be shot and I'll get to it.
There would need to be some protection against trolling still-active groups though. Sandcastle-kicking is already bad enough, far worse than ganking in my opinion - if you send someone to the rebuy screen then, barring explorers that for some reason decided to cash their data in open in deciat, at worst you've cost them a few hours worth of playtime. Tank someone's faction influence, and not only do they have no way to prevent it, or even any way to realise they're under attack until it's already happening, but you can send weeks of effort up the spout. You can harass people for weeks like this and leave them with no recourse but to grind hard to try and hold you off. At least with the way things are now, they're always left with something to pick up once the attackers finally get bored and move on.
This is, by the way, the reason why I never lead with a direct push into an area that seems to be controlled by a player supported faction. My usual MO is to pick one of their systems, kick the second place position into a war for control, then leave the system alone. If they take any steps to defend it, if they so much as win a single day of that war, I leave them be.