There are no supply lines! Raiders are defying thermodynamics, throwing more bodies at you than the depopulated desolate planet with the nearest settlement days

There are no supply lines! Raiders are defying thermodynamics, throwing more bodies at you than the depopulated desolate planet with the nearest settlement days of caravaning away ever had. You can't destroy them where they live, you can't make regions safe, you can't see their raiding parties coming. They just spawn out of thin air because you made a nice statue.