The Force Wars were a ten year long conflict that took place on Tython more than seven centuries before the formation of the Galactic Republic. It is considered the first conflict between the followers of the light and dark sides of the Force.
In 25,793 BBY, the conflict arose between the followers of the Ashla, or light side of the Force, and the followers of the Bogan, otherwise known as the dark side of the Force.
Both sides utilized metal swords augmented through the Force. In 25,783 BBY, the Bogan's followers were defeated. The light Force users of Tython established a monastic society of guardians of the peace, known as the Jedi, and eventually left their world, settling on the planet Ossus730 years later.