The Amazon was created by William Moulton Marston and H.G. Peter, detailing Princess Diana's first meeting with U.S. Army pilot Steve Trevor as his plane crashed near Paradise Island, and, after winning a competition against her fellow Amazons, Diana left her mother, Queen Hippolyte, and her home, Paradise Island, to go fight World War II in Man's World as Wonder Woman!
But, as you might have noticed, Wonder Woman didn't make the cover.
The main story of the issue (with a cover by Everett Hibbard) was having Starman and Dr. Mid-Nite join the Justice Society of America (and a short story about pilot Hop Harrigan)!
Wonder Woman wouldn't get a chance to join the group until a few issues later with a major cover appearance.....
Superman and Batman.