Force wars

The Force Wars were a series of conflicts on the planet Tython between the followers of Ashla and the followers of Bogan, the light and dark sides of the Force, respectively. The Force Wars lasted a full decade, and the followers of Ashla emerged victorious, forcing the followers of Bogan back into the shadows to disappear. Following this, the followers of Ashla established the Jedi Order on Tython, and codified a great deal of Jedi knowledge, rituals and laws as to prevent others from falling victim to the Bogan again.