During the Galactic Civil War, the Galactic Empire stage an attack on the planet Kostra. During the engagement, the Alliance pilot Fulkrehm Protial was forced down in his Y-wing and exposed to near-fatal levels of trosilon nerve toxin.[2] Aboard the Tantive IV, Princess Leia Organa visited the world to secretly support the Rebel cause. She transmitted mesages, dispensed much-needed material, and brought time for the Rebel evacuation.[1]