The Second Great Schism was a divisive split among the ranks of the Jedi Order that occurred in the year 7003 BBY. Jedi who practiced alchemy and the dark side of the Force as Dark Jedi broke from the Jedi Order, and the war known as the Hundred-Year Darkness followed in 7000 BBY.
- "Heritage of the Sith"—Star Wars Insider 88
- Jedi vs. Sith: The Essential Guide to the Force
- The Complete Star Wars Encyclopedia