The conflict known as the Sixty Hour War took place at Derilyn during the initial period of the Galactic Civil War. After the Galactic Empire was formed, Palpatine's decrees sparked fury on Derilyn, and Senator Wuxod voiced their opposition. Soon after, Wuxod vanished, and on the opening day of Fifthmonth, Imperial forces launched an invasion of Derilyn.
A sector army, accompanied by six Imperial Star Destroyers and TIE fighter squadrons, assaulted the world; the city of Paran was obliterated by orbital strikes. The native Derilytes fought back, and the engagement continued for seventy-two hours. Paran after its destruction.
With Derilyn under Imperial control, rebellious planets within the Elrood sector yielded to the Empire. In the wake of Paran's annihilation, a Derilyte resistance cell called the Friends of Paran came into being.