They were not, however, enough to prevent an assault by the Sinestro Corps, which resulted in the deaths of many Green Lanterns.

# Lethal force is authorized against the Sinestro Corps.

After the Green Lantern Sinestro betrayed the Green Lantern Corps and created the Yellow Lantern Corps, a prophecy was fulfilled that Lantern Corps of the other cosmic energies of emotion shall form, such as Red ( rage ), Orange ( greed ), Black ( death ), White ( life ), Indigo ( compassion ), Blue ( hope ), and Violet ( love ).

The decision of the Corps to execute Sinestro resulted in the activation of a previously unknown fail-safe that depowered the rings of every Green Lantern except for Hal Jordan, Guy Gardner, Gnort, and Ch ' p.

Rogue Green Lantern Sinestro, working with the Anti-Monitor, created his own version of the Corps.

Dubbed the " Sinestro Corps ", it recruited beings capable of generating great fear.

One of the members recruited into the Sinestro Corps was Amon Sur, the son of former Green Lantern Abin Sur, who held a grudge against Hal Jordan for being chosen to bear his father's ring instead of him.

Armed with yellow Power Rings and Lanterns manufactured on Qward, the Sinestro Corps staged an attack on Oa, killing dozens of Green Lantern Corps officers, kidnapping Kyle Rayner, and freeing Superboy-Prime, Parallax, and the Cyborg Superman from the Corps ' supervision.

As the Sinestro Corps ' campaign of terror spread, the Guardians, in desperation, rewrote the first Law of Ten in the Book of Oa, enabling the remaining Lanterns to use lethal force against members of the Sinestro Corps.

This distinction played a part in the expulsion of Laira from the Green Lantern Corps for killing Amon Sur when he was unarmed, her induction into the Red Lanterns, and subsequent death over the course of events during the Sinestro Corps War and Blackest Night storylines.

Following the Sinestro Corps War, Ganthet and Sayd are banished from the Guardians.

The Green Lantern corps, along with the other six corps ( The Sinestro Corps, the Red Lantern Corps, The Indigo Tribe, The Blue Lantern Corps, The Orange Lantern corps, and the Star Sapphires ), fight the black lanterns to regain safety and order in the universe.

Hal takes the Sinestro Corps ring, Guy takes the Red Lantern ring, John takes the Indigo Tribe ring, and Kyle takes the Blue Lantern ring.

As of 2011, Sinestro is still an unwilling Green Lantern, Hal remains exiled ( although he has been forced to assist Sinestro's activities with a ring created and powered by Sinestro ) while Kyle has gone AWOL alongside six members of the other Lantern Corps.

When Nekron is defeated, Larfleeze takes the ring from Luthor, leaving him powerless, and allows Luthor to remain on Earth with the Green Lanterns ( although Sinestro notes that this is the first time Larfleeze has given anyone anything ).

During the fight, the entire Corps is kidnapped by Sinestro to act as a power source for a doomsday device.

The leader of the Corps is Sinestro, with Abin Sur, Kilowog, and Tomar-Re being central characters.

One year later, Superboy is released from his prison by the newly-formed Sinestro Corps and joins them, becoming one of their heralds and wearing a Sinestro Corps uniform beneath his Anti-Monitor inspired armor.

He again appears in the sixth issue as he is deputized into the Sinestro Corps for 24 hours in order to combat the Black Lanterns.

Scarecrow is chosen as a bearer of the twin of Sinestro's yellow ring as a temporary Corpsman, giving him the powers of a member of the Sinestro Corps.

Later on, he relents and goes over the files and narrows it down, but he is then interrupted and killed by Sinestro, who ruptures his heart.

In an interview with Geoff Johns, writer of the current Green Lantern series, it was revealed that the Sinestro Corps is a mirror organization to the GLC.

In the Green Lantern Corps story " Tygers ", by Alan Moore, Abin Sur is witness to a prophecy which states that among the gathered enemies to destroy the Green Lantern Corps would be the " Weaponers of Qward "; the Sinestro Corps War storyline is a partial fulfillment of that prophecy, later to be known as " The Blackest Night ".

Following Sinestro's return to the Green Lantern Corps and his subsequent destruction of the Sinestro Corps, the Weaponer has made a yellow ring for Arkillo, one that is free from the lethal boobytraps that Sinestro had implanted in all previous yellow lantern rings, for in turn have the chance to get inside Invictus ' ship.

Thaal Sinestro is a fictional character, an alien supervillain / anti-hero in the DC Comics Universe.

Created by John Broome and Gil Kane, Sinestro is the former mentor of Hal Jordan and the arch-nemesis of the entire Green Lantern Corps.

The Green Lantern Corps is once again reformed with the return of Hal Jordan so Sinestro decides to found the Sinestro Corps, offering yellow power rings and a role in the Corps to the most feared and savage warriors of the universe.

Sinestro is then imprisoned in Oa's Sciencells where he learns from Hal Jordan that he has received a death penalty.

Sinestro is to be executed on his homeworld of Korugar.

After being taken to Ysmault, he is nailed to a cross to await his execution at the hands of Atrocitus who wishes to make Sinestro suffer greatly by taking his revenge on everything he has ever cared about.

For using the power of the Green Lantern to instill fear rather than combat it, the Guardians banished Sinestro to the antimatter universe, a counterpart to the " real " universe made up of " negative matter ".

The two fought to a draw, with Sinestro escaping to the antimatter universe when his ring was damaged by Hal during the fight.

After the Battle of Metropolis, Sinestro retreated to the antimatter universe.

Sinestro is imprisoned in the antimatter universe, on the planet Qward.

With the Green Lantern Corps restarted with the return of Hal Jordan, Sinestro has decided to found the Sinestro Corps, offering yellow power rings, and a role in the Corps, to the most feared and savage warriors of the universe.

Creating a yellow power ring for Sinestro to use, the Weaponers sent him back to the " positive matter " universe to seek his revenge.

Before the Guardians took a leave of absence from their universe to attempt mating with their female counterparts, the Zamarons, they constructed an inescapable prison for Sinestro and thousands of others on Oa.

During the confrontation with Nekron, Sinestro is apparently killed by Nekron, but healed back to life by the White Entity, claiming to be in harmony with every living being in the universe and thus reborn as the true Guardian of the Universe.

Having learned that the " Flashpoint " is a moment when all of history will be changed, Sinestro travels to Earth to confront Abin Sur, determined to find the " Flash " who changed history and use his power to reset the universe to what he believes it should be.

In the film, Sinestro is a respected member of the Green Lantern Corps who believes the Guardians and the Corps aren't proactive enough to maintain order of the universe.

Their fight continues on Earth, while Sinestro transports his crew and his ship from the anti-matter universe.