Morcanth was the location of an underground base where a fallen Jedi Padawan, Winslau Da'k, imprisoned his own Jedi Master. Here Da'k used his powers to gain wealth and luxury, while delving into the dark side of the Force.
However, the Jedi was able to contact through the Force a group who were able to avoid capture by the alien fleets, infiltrate Morcanth, and defeat Winslau. The old master was released, later aiding his rescuers as a mentor and advisor.