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The Green Lantern Corps is an intergalactic peacekeeping organization comprised of individuals dubbed Green Lanterns who conduct themselves akin to an intergalactic police force, set on maintaining peace throughout the cosmos. They are known to derive their power and ring constructs from the emotion of Will.
The Green Lantern Corps was founded by the Guardians of the Universe, an ancient race of beings who sought to create a force of benevolent protectors against the forces of evil.
During Steppenwolf attempted invasion and terraformation of Earth some thousand years prior to present, an unidentified Green Lantern joined the forces of Earth, with the assistance of the Olympian Gods, to battle him. The Lantern used his ring to thwart the invasion of Apokolips' forces until he was later slain by Steppenwolf.
Every Lantern is given a Green Lantern ring to aid them in their mission for intergalactic peace, and each ring is paired with a power battery to recharge its energy after it is spent.
- In the comics, typically only one Green Lantern is assigned to a space sector at a time. However, due to the large amounts of threats present to it, Sector 2814 (containing Earth, among other planets) is under watch by more than one Lantern.