Justice League of America #123 (October, 1975)
1975’s team-up between the Justice League of America and the Justice Society of America was the thirteenth such event since the annual tradition had begun in 1963. Over the years, DC Comics fans had been privileged to vicariously visit such parallel worlds as Earth-One, Earth-Two, Earth-Three, Earth-X, and even the short-lived Earth-A. But there was one particular Earth that had been established as existing in what would eventually be known as “the DC multiverse” that had yet to be glimpsed in any of the JLA-JSA summer shindigs… though readers of those comics could hardly claim to be unfamiliar with the place. After all, they lived there.
Of course, I’m talking about Earth-Prime. Read More








