They patrol the farthest reaches of the DC Universe at the behest of the Guardians, a race of immortals residing on the planet Oa.
Each Green Lantern is given a power ring, a weapon granting the use of incredible abilities that are directed by the wearer's own willpower.
The group is first mentioned in Showcase #22 (1960) when a dying Green Lantern passes on his ring to Hal Jordan.
Over the years, writers have introduced a large cast of Green Lanterns in both supporting and starring roles.
The Green Lantern Corps is featured in the Batman: The Brave and the Bold and Smallville Season 11 digital comic based on the TV series.