AI War:Human Marauders
Hostile human vagabonds who live in deep space will occasionally raid human or AI planets via traditional propulsion methods (and thus come in from the edge of a system, not a wormhole).
This Minor Faction will periodically spawns a number of marauder-controlled Dagger Frigates and Buzz Bomb Launchers which will proceed to attack anything on that planet that isn't themselves. These typically spawn quite far out and defenses will rarely be in a position to do anything about these intruders, and unchecked they can wreck havoc on undefended systems.
This is a pain-only minor faction and is considered a natural balance for the Human Resistance Fighters faction.
Turning up the intensity in the lobby will increase the spawning frequency and number of marauders spawned.