Green Lantern Corps
22,000 BCE - With the failure of the Manhunters, the Guardians of Oa construct the Central Oan Power Battery and begin building the Green Lantern Corps.
1942 - 26-year-old Thaal Sinestro witnesses the fall of Green Lantern Prohl Gosgotha, persued by a Weaponer of Qward. He uses the ring to bring down the Korugar ruins on the Qwardian to kill him, and then allows Prohl to die rather than return his ring, joining the Green Lantern Corp.
51 years ago - Manhunters tech is discovered by the Psions. Their meddling reactivates the Manhunters who assault Sector 666. The Guardians of Oa instruct the Green Lantern Corps to try to stop them, beginning the Manhunter Wars.
45 years ago - the Manhunters war with the Green Lantern Corps leads to the destruction of the planet Ryut, the home of Atros.
43 years ago - The Green Lantern Corps are forbidden from returning to Sector 666 when the Guardians of Oa are forced by Atros & other leaders to close it off after the defeat of the Manhunters.
18 years ago - 23-year-old Hal Jordan is chosen by the Abin Sur as the new Green Lantern of Earth, while Guy Gardner is chosen as his backup. He is brought to Oa where he begins his training with the Green Lantern Corp, assigned as a trainee to Thaal Sinestro. Soon he discovers Sinestro's tactic of ruling his home planet of Korugar through fear. He undermines Sinestro's regime and exposing him to the Guardians. Sinestro is stripped of his rank and banished into Qwardian Pocket-Space.
13 years ago - 28-year-old Hal Jordan is assigned 13-year-old Arisia Arisia Rrab as an apprentice. Thaal Sinestro returns to Guardian space, having taken command of the Weaponers of Qward, who have outfitted him with a yellow Anti-Oan ring. He assaults several Green Lanterns inside their own sectors until he is stopped by Hal Jordan & Arisia Rrab.
11 years ago - Thaal Sinestro attacks Earth, Injuring both 30-year-old Hal Jordan and his backup lantern, 28-year-old Guy Gardner. A new Green Lantern of Earth, 29-year-old John Stewart, is chosen and defeats Sinestro.
10 years ago - the Manhunters destroy planet Xanshi, framing 30-year-old John Stewart. He proves his innocence in Citadel court, prompting the Manhunters to attack Oa. 15-year-old Yrra Cynil is the lone survivor of the destruction of Xanshi. She flees to deep space to escape the reach of the Green Lantern Corps, unaware that the act was actually performed by the Manhunters. She begins her advanced combat training under the darkspace warlords.
9 years ago - The Guardians of Oa are fractured when a group of Rogue Guardians, lead by Scar, splinter away and create their own group of Lanterns, including Guy Gardner.
8 years ago - Thaal Sinestro and the Weaponers of Qward stage a massive coordinated assault of Citadel Space, exploiting the divide between the Guardians of Oa. He is ultimately stopped by 33-year-old Hal Jordan and the Green Lantern Corp. The Rogue Guardians' honor guard Lanterns are depowered. Sinestro is trapped on Earth with a vastly depowered ring & joins Dr. Sivanna's Secret Society to attack the Justice League, but has his ring stolen by Guy Gardner and is imprisoned in the Oan Power Battery.
7 years ago - 18-year-old Yrra Cynril begins murdering Green Lanterns, avoiding detection from the Green Lantern Corps.
5 years ago - Coast City on Earth is destroyed by Mongul. the Guardians of Oa forbid Hal Jordan from rewriting time to save it, and in his grief and maddness he attacks Oa with the intention of absorbing the power battery. Thaal Sinestro is released from the Power Battery by the Green Lantern Corp in a last-ditch effort to stop him. Their battle destroys much of Oa. Hal absorbs the Power Battery & becomes Parallax. Green Lantern rings across the galaxy are depowered, leading to the deaths of many Lanterns. Killowog uses the ancient Lantern weapon the Starheart to save the Guardians by bringing them to Mogo, and folding the entire planet into the Paths Beyond. Only Ganthet remains behind. He forges a final ring and brings it to Earth, giving it to Kyle Rayner.
1 year ago - Kyle Rayner, while in space with the surviving Titans to save 27-year-old Donna Troy, discovers Thaal Sinestro amassing army in Qwardian Space. He races across the galaxy to collect surviving Green Lanterns to restart the Oan Power Battery and reignite the Green Lantern Corps. Killowog returns Mogo from the Paths Beyond with the Guardians of Oa. In the ensuing battle Sinestro is again captured and imprisoned on Oa. John Stewart, Guy Gardner & Arisia Rrab's's rings are recharged by the reignited Oan Power Battery & they return to Oa. John takes Kyle's place in the Watchtower while he works to rebuild the Corps, & Guy is chosen as the first member of the new Corp's Honor Guard, serving as a fixer across every sector. Membership: 26-year-old Kyle Rayner, 39-year-old John Stewart, 38-year-old Guy Gardner, 25-year-old Arisia Rrab
now - 40-year-old John Stewart, after a mission into space with the Watchtower to save Superman from Warworld, trades positions with 27-year-old Kyle Rayner, taking over the posting on Oa.