A raid targeting Tangrene occurred amidst the Galactic Civil War, marking the high point of military success for Garm Bel Iblis's movement.
Three years following his departure from the Rebel Alliance, Garm Bel Iblis launched an assault on Tangrene, where the Empire maintained an Ubiqtorate facility, utilizing his entire fleet of five Dreadnaught-class heavy cruisers. Bel Iblis's strategies successfully drew away three Star Destroyers that were protecting the base, enabling him to obliterate the Ubiqtorate installation. The attack resulted in comparatively few Rebel losses, moderate damage, and one cruiser being sidelined for approximately seven months.