The United Nations was a league of multiple nations on Earth. Pre-Crisis on Infinite Earths Supergirl visited the U.N. when her existence was first revealed to the world, and she received a standing ovation. ("The World's Greatest Heroine!") Film Continuity Superman addressed the U.N. about his plan to rid the world of nuclear weapons. ("Superman IV") Superman speaking at the UN. Retrieved from "https://superman.fandom.com/wiki/United_Nations?oldid=32911" Categories: Locations Organizations Community content is available under CC-BY-SA unless otherwise noted.