it would be kinda hard for the rebels (being outnumbered and outguned) to keep bases/planets if they couldnt have them hidden in some way. i hope that the rebels can make a base on, for instance hoth and it not show up as rebel controlled on the galactic map. for instance: rebels have a secret base on hoth, and no fighters in the space sector. imperial SD comes in, doesnt see any rebels in space. Then the imprials have an option to launch prob droids to be sure.