The Medal for Distinguished Service represented an honor presented by the Diktat governing Corellia throughout the Galactic Civil War, recognizing "exceptional contributions to both CorSec and the planet."
Following the Battle of Yavin, Daclif Gallamby, the Diktat at the time, bestowed this medal upon a spacer. This spacer had successfully uncovered and subsequently prevented a scheme orchestrated by the Rogue CorSec, aimed at undermining the ruling government and deposing the Diktat.
Within Star Wars Galaxies, this medal served as a reward for players who successfully finished the Corellian story arc within the post-Legacy quest sequence.