(Green Lantern II #127) - The Guardians contacted Chaselon and the Corps after the Weaponers of Qward invaded Oa and held the Guardians captive, intending to use their immortality to construct the ultimate weapon. The Weaponers erected a yellow vortex that prevented most of the Corps from reaching Oa, but one member sacrificed his life to release Hal Jordan and the Guardians. Sinestro turned against the Weaponers when they revealed his usefulness to them was at an end, so he teamed with Hal to destroy the yellow vortex. Once on Oa the Corps utterly defeated the Weaponers. A number of Lanterns were lost, and Hal said it was a time for mourning.

(Green Lantern III #100) - Chaselon and the Corps helped Green Lantern Hal Jordan and time-traveling GL Kyle Rayner defeat Sinestro and prevented him from setting an asteroid on a collision course with Oa.

(Guy Gardner: Warrior #20) - Guy Gardner and Green Lantern Alan Scott wanted to learn why Green Lanterns were turning up dead and stripped of their power rings, so Guy recruited his Justice League America teammates to travel to Oa. Approaching Oa they spotted several dead Green Lanterns, including Chaselon. On Oa the heroes were attacked by power constructs and confronted by the source of the carnage, the power-mad Hal Jordan.

(Green Lantern IV #12, 13) - Chaselon didn’t die, his body was claimed by the Manhunters, who were seeking Green Lanterns for a connection to the Central Power Battery. Hal Jordan and Guy went to the Manhunter homeworld Biot to rescue the Lanterns Hal thought he’d killed and were attacked by Manhunter Highmaster units powered by the bodies of Green Lanterns, including one Highmaster containing Chaselon. Hal and Arisia took control of one of the Highmasters, freeing the Lost Lanterns and destroying Biot. The Corps celebrated the return of the Lost Lanterns to Oa.

(Green Lantern: Sinestro Corps Special #1) - Chaselon was on Oa when the planet was assaulted by the Sinestro Corps. After a valiant fight many Green Lanterns were killed, , including Chaselon’s space sector partner Diamalon, and the Sinestro Corps fled with sciencell prisoners Superboy Prime and Cyborg Superman as their newest recruits.

(Green Lantern IV #21) - Arisia and the Corps began picking up the pieces after the assault on Oa, and Salakk realized that the Sinestro Corps were picking off Lanterns across the universe, leaving over 50 dead. The Lost Lanterns were sent to Qward to rescue Kyle Rayner from the Sinestro Corps, while the rest of the Lanterns were ordered by the Guardians to stay on Oa and prepare for another assault.

(Green Lantern IV #25) - The Sinestro Corps War raged on Earth, and while Chaselon, the GLC and an army of superheroes battled the Corps the Anti-Monitor prepared to unleash an anti-matter wave to destroy Earth. With Earth’s destruction, the entire 52 would fall, and he would once again rule all that was. The GLC ruptured the heart of Anti-Monitor’s Warworld, the Sinestro Corps central power battery, and created a shield around Warworld and the Monitor. The ensuing blast nearly destroyed the Anti-Monitor, and he was finished off by Superman-Prime, who betrayed him for having destroyed his home, Earth-Prime. GL Hal Jordan defeated Sinestro in personal combat, and the Sinestro Corps, lacking any leadership, fled Earth. The heroes rejoiced and began rebuilding the damage the Sinestro Corps did.