Destroying ships, enemy structures, assassinations, things like that. For instance in ground combat, you send in a covert team or a hero to take out a shield generator or a heavy weapons factory. In space, taking out the enemy's brand new top line ship as it leaves the shipyard. That's what I am referring to. We know espionage is featured in the game since the Rebels have to steal the plans for the Death Star and the prototypes of the X-Wing. To me it would only make sense to have sabotage as well.