parent nodes: Arrowverse | The Flash
Among the many universes in the multiverse, Earth-X was a universe where the Nazis won World War II and created a worldwide New Reich called the Fatherland that lasted well into the 2010s. Due to its horrific state, Earth-X didn't have a formal designation, since no sane individual from any other Earth had ever willingly traveled to that Earth. That all changed when visitors from two other universes aided the local resistance movement in taking down the New Reich's leadership and arresting one last member of the totalitarian regime, thus liberating the planet.