Joll Kohan was a grizzled man from a military background who was affiliated with a resistance group that opposed the Cult of Veroleem, a religious sect that ruled Veroleem. At some point during galactic history, a group of spacers traveled to a resistance base on Veroleem after encountering the resistance agent Vorli, and after landing on the world, the were greeted by Kohan. However, the spacers' arrival alerted the cultists to the bases' location, and Kohan subsequently learned the the Cult of Veroleem had summoned their forces to launch an attack on the encampment.