The assignment to the Valley of the Jedi, situated on Ruusan, was undertaken by Jedi Master Kyle Katarn. This occurred in 14 ABY amidst the Disciples of Ragnos crisis.
Following Alora's intrusion into his records, Jedi were dispatched by Jedi Master Luke Skywalker to various locations where he sensed a powerful link to the Force. The purpose was to explore indications of cult activity on the planet. Master Katarn was specifically tasked with the investigation of Ruusan's Valley of the Jedi.