<Tr> <Th_colspan="2"> Roster </Th> </Tr> <Tr> <Td_colspan="2"> See: List of Justice League members </Td> </Tr> <P> The Justice League is a group of fictional superheroes appearing in American comic books published by DC Comics . The justice league was conceived by writer Gardner Fox and first appeared as a team in The Brave and the Bold #28 (March 1960). </P> <P> The justice league is an assemblage of superheroes who join together as the Justice League . The seven original members were Superman, Aquaman, Flash, Green Lantern, Martian Manhunter, Batman, and Wonder Woman . The team roster has rotated throughout the years, consisting of many superheroes from the DC Universe, such as Atom, Black Canary, Green Arrow, Hawkgirl, Hawkman, Plastic Man, Stargirl, Shazam, Cyborg, and Zatanna, among others . </P>

When did the first justice league come out