The Sith Holocaust was a major event that occured in the history of the Star Wars franchise during the Old Republic Era. ~ Jedi Master Ghost-Dural on the Sith Holocaust.
Jedi and Republic forces were sent to Korriban and other Sith planets to ensure no remnants of the Sith Empire remained.
It was at this moment that the Republic made what might now be considered a mistake: the Sith no longer posed a threat to the Republic, but the Supreme Chancellor was unsatisfied.