The fictional Green Lantern Corps is an intergalactic police force featured in DC Comics, particularly series featuring the superhero Green Lantern, Earth’s member of the group.
The Green Lantern Corps patrols the reaches of space at the behest of the Guardians of the Universe, a race of immortals as old as the universe, vastly powerful, noble-minded and hyper-intelligent, but also arrogant and obstinately committed to ancient traditions. The Guardians created the Green Lantern Corps some three billion years ago and the force has survived multiple rebellions, murders and collapses from within and outside. The Guardians administer the Corps from the planet Oa at the center of the universe. The Guardians divided the universe into 3,600 “sectors” and choose two natives of each sector to serve as that sector's protectors. Thus the Corps holds 7,200 members, plus additional numbers serving in roles not linked to particular sectors (such as drill instructors and the honor guard). Each Green Lantern is given a power ring, a fantastic weapon and artifact granting the bearer incredible power limited only by their willpower.
