Wonder Woman Vol.1 #179
Just as Steve Trevor is labeled a traitor (though he is really going undercover in pursuit of Doctor Cyber), Wonder Woman is summoned to Paradise Island, where Hippolyta announces that the Amazons are retreating to another dimension to rest and renew; Diana chooses to stay and help Steve, giving up all of her powers and Amazonian heritage; Starting a new life, and taking on I Ching as her mentor, Diana has barely begun her training when Steve shows up severely wounded.
Printed: Dec 1968
Writers: Denny O'Neil
Art: Mike Sekowsky and Dick Giordano
Cover: Mike Sekowsky and Dick Giordano