In July 1947, Boy Commandos #23 includes a story where the Boy Commandos are brought to the underwater city of Atlantis, which of course differs from the versions of Atlantis that each of Aquaman, Wonder Woman and Superman have variously visited. But what’s interesting about this story is the hints of Jack Kirby world-building and burgeoning grandiosity. Just check out this battle scene:
And hey, maybe this is the first instance of Kirby Krackle?