The Coyerti campaign occurred in 1 ABY when the Coyerti species asked for protection from the Galactic Empire. The Rebel Alliance sent Twilight Company to intervene. During the battle, defected governor Everi Chalis provided information about a biotoxin facility, which a squad of Rebel troopers destroyed, and were exposed to toxins, but quickly recovered. At the end of the battle, the Coyerti army joined to destroy the Imperial garrison.