FALL OF THE REPUBLIC
The Jedi served the Republic for over a thousand generations, acting as peacekeepers. But with the reemergence of the Sith, ancient dark side practitioners, the fate of the Jedi would take a sad turn.
Orchestrating the Clone Wars, Darth Sidious pulled the galaxy apart with the Jedi caught in the middle. With the the issue of Order 66, Emperor Palpatine -- in reality, Darth Sidious himself -- named every Jedi an enemy of the Republic and eradicated the Order. Anakin Skywalker, once believed to be the Chosen One, turned to the dark side and helped the Empire destroy the Jedi.
While the Sith had gained control of the galaxy, there was hope. Yoda and Obi-Wan Kenobi, both Jedi Masters, survived the purge. They waited in exile until the time was right to train Luke Skywalker, son of Anakin, who could destroy Sidious and restore freedom.