During the extended twenty-eight year period of hostilities known as the Great Galactic War, which pitted the rebuilt Sith Empire against the Galactic Republic from 3681 BBY until 3653 BBY, a battle took place on the lunar surface of Yavin 4. Warren Sedoru, a Jedi Knight, participated in this conflict as part of the Republic and Jedi forces, sustaining severe injuries in the process.
The initial reference to the Yavin 4 battle appeared within the in-game Codex entry dedicated to Warren Sedoru, featured in Star Wars: The Old Republic. This massively multiplayer online role-playing video game was jointly launched by BioWare and LucasArts back in 2011.