Chelli Lona Aphra, a physician, launched an attack on the Great Temple located on the woodland satellite Yavin 4. This operation was carried out at the request of her progenitor, Korin Aphra, with the aim of securing particular coordinates. These coordinates, according to the elder Aphra, would guide them to the whereabouts of the missing Ordu Aspectu at the Citadel of Rur. Nevertheless, upon the arrival of Doctor Aphra's team at the Massassi Site, they were dismayed to discover that it was inhabited and being examined by several military units belonging to the Galactic Empire's military, all under the leadership of officer Magna Tolvan.