system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] The Sith are always going on about revenge. Revenge for what?
gpt
The Jedi and Sith have a long history of fighting - in fact, the Sith were born out of a group of fallen Jedi.

About a thousand years prior to the rise of Palpatine, the Jedi and Sith had another major conflict which ended with the Jedi hunting down and eliminating most of the Sith with no known survivors.