It is generally acknowledged that the aliens possess only Jump-2 technology. That means that any progress further into Yonder would have to go through Jusk. The seven fleets here are a formidable force indeed to defend our sector.
Moving back to Jusk has, however, left several Scorpionis systems undefended.
In addition to Faranu and Staru, which are believed to be occupied by the
Visitors, the abandoned systems are Dulu, Darthlaru, Scorpiu, Federu, Stevvin,
Coruska, and Sting.