The Sith Wars, spanning roughly from 5000 BBY to 1032 BBY, represent a series of intense battles. These conflicts involved the Jedi Order and the Sith vying for supremacy across the galaxy.
The Great Hyperspace War was a major clash between the forces of the Galactic Republic and the Sith Empire. The Qel-Droma Epics place the war around 5000 BBY, starting with the invasion of Empress Teta (formerly Koros Major) by the Sith Empire. This planet had just been conquered by Empress Teta. The narrative suggests Teta collaborated with the Jedi Order to oppose the Sith, ultimately repelling the Sith Lord Naga Sadow and dispersing Sith forces throughout the galaxy.
The Great Sith War was a significant confrontation between the Jedi Order and the Sith. According to Jedi Master Oppo Rancisis, victory was ultimately secured by the Jedi.
The resurgence of the Sith involved combat between the Jedi Order and the Sith Order. This occurred approximately four thousand years prior to the Clone Wars. The conflict's severity led many Jedi to utilize the Form VII lightsaber technique, also known as "Juyo".
Around 3650 BBY, the Chiss species became entangled in the conflicts of the Galactic Republic and the Sith Empire. The Chiss Ascendancy encountered various aliens before withdrawing to their territories around 3450 BBY.
Cervil the Uncanny, a Jedi who participated in the struggles, documented instances of Jedi Order members employing lightwhips as a defense against Forbidden Forms used by the Sith.
The Forbidden District on the planet Exegol contained abandoned shipyard forges that originated during the Sith Wars. Vurk Jedi Master Harli Cogra's book Chronicles of the Jedi, penned after the destruction of Starlight Beacon in 230 BBY, referenced the ancient wars fought between the Jedi and Sith.
The Sith Wars received its initial mention within the current Star Wars canon through the 2016 reference book titled Nexus of Power.
Within Star Wars Legends, the Sith Wars were first alluded to, though indirectly, in the 2004 video game Star Wars: Knights of the Old Republic II: The Sith Lords, developed by Obsidian Entertainment. The conflict was first depicted in the 2009 webcomic The Old Republic, Threat of Peace Act 1: Treaty of Coruscant, and formally identified in the 2012 reference book The Essential Guide to Warfare, authored by Jason Fry and Paul R. Urquhart.