This award was given to Rebel soldiers who serve in a covert operation, and manage to not die, which in most cases is a good thing.
"Jimmirsin and Murleen somehow managed to survive against ridiculous odds, mostly because their choices were limited by new Alliance technology called "rail" flight. Essentially, they were guided along a specific path that they couldn't deviate from much, which really made the whole thing pretty easy. This was unknown to both Jiim and Ru during the mission, as they both felt they were merely being guided by the Force, which is ridiculous. But anyway, they tried hard, and blew stuff up and got a TIE Phantom, even though it self destructed. Meh, could've been worse."