- "It's a little known fact that the Sith actually won the Jedi Civil War"
The Jedi Civil War was a war between the Sith Empire and the Galactic Republic that lasted from 306 BTC to 303 BTC. Whilst the final battle achieved a decisive victory for the Republic, it came at such a great cost that the Republic struggled to rebuild. This allowed the remnants of the Sith to obtain an overall psychological victory by causing the complete extermination of the Jedi Order
Jedi Civil War on Wookieepedia