"Trinity War" is an 11-issue comic book story arc first published in 2013 by DC Comics, featuring the fictional superhero teams the Justice League, Justice League of America, and Justice League Dark. The arc spans several titles, including Justice League, Justice League of America, Justice League Dark, Constantine, Trinity of Sin: Pandora and Trinity of Sin: The Phantom Stranger. The story is an action-mystery that sees the Justice League, Justice League of America, and Justice League Dark clash, in order to solve the mystery of Pandora's Box. The event also introduces the Crime Syndicate and the reveal of Earth-3 to The New 52.

The Crime Syndicate are teams of supervillains from one of DC Comics' parallel universes where they are the evil counterparts of the Justice League. The original team was specifically known as the Crime Syndicate of America and is sometimes abbreviated as CSA. This first superpowered Crime Syndicate team appeared in Justice League of America #29 in August 1964. The primary successive incarnation, known as the Crime Syndicate of Amerika, first appeared in the 2000 JLA: Earth 2 graphic novel.