Does anyone have any idea what determines when and how often rebel forces show up in your star systems? I've played through a number of maps before, and never run into them, including a 19-hour, 5-star, 70+ planet map, in which I never saw a rebel force, and in my latest game, I'm under 9 hours into it, and I've been through 3 rebel forces attacks already. What sparks these attacks?
