John Byrne's run included a period in which Diana's mother Hippolyta served as Wonder Woman, having traveled back to the 1940s, while Diana ascended to Mount Olympus as the Goddess of Truth after being killed in issue #124. In addition, Wonder Woman's Amazon ally Nubia was re-introduced as Nu'Bia, scripted by a different author. Byrne posited that Hippolyta had been the Golden Age Wonder Woman. Byrne restored the series' status quo in his last issue.
Wonder Woman, while in her guise as the human Diana Prince, is an extremely experienced genius antiquities dealer, with Diana's tremendously long immortal life and natural fluency in all human languages allowing her to accumulate an immense amount of knowledge on the subject, though (being an Amazon with Old God heritage) she seems to specialize most in ancient Greco-Roman antiques. Hence, Diana works as Curator for the Department of Antiquities at the extremely prestigious Louvre Museum in France, and she is held in very high esteem by the curator of the Gotham City Museum of Antiquities. She was swiftly able to tell that the museum's exhibit of Alexander the Great's sword was a fake, knowing exactly where the actual sword was and impressing Batman himself.
A stand-alone #0 issue was released in September which explored Diana's childhood and her tutelage under Ares, the God of War, now known most often as simply 'War'. The issue was narrated in the style of a typical Silver Age comic book and saw Diana in her childhood years. The main plot of the issue was Diana training under War as he thought of her being an extraordinary girl with immense potential. The issue ultimately concluded with Diana learning and experiencing the importance of mercy, which she first learned when War showed it to her during their sparring. This later translated into her refusal to kill the Minotaur – a task given to her by War; however, this show of mercy makes her a failure in War's eyes, which was actually his fault since he inadvertently "taught" her mercy and affection as his protege. Later in the series, Wonder Woman is forced to kill War during a conflict with her evil half-brother, Zeus' son First Born, and herself becomes the God of War. After the Amazons are restored, she rules over them both as a warrior queen and God of War, as the ongoing conflict with First Born escalates. At the end of Azzarello's run, as part of a final conflict, Wonder Woman kills First Born, while Zeke is revealed to have been Zeus' plan for resurrection, with Zola revealed to have been a mortal shell for the goddess Athena, who gave birth to Zeus just as he once did to her. Wonder Woman pleads with Athena not to allow the Zola personality, whom she has grown to love as a friend, die with Athena's awakening. Athena leaves the site in animal form, leaving a stunned and confused Zola behind with Wonder Woman.
Thus although by the modern depiction her accomplishments at the time seem ordinary, in that era they were more so. Diana Prince was originally an army nurse, but quickly attained the rank of lieutenant in Army Intelligence. This was partially a creative convenience so that she could be close to both Steve Trevor and received information which she needed to pursue her superheroics. In the real world though, this role in Army intelligence, even as the secretary to General Darnell, was still a rare position for a woman to hold in society. At this time as well, the character had her only real sidekicks in her history in the form of Etta Candy and the Holliday Girls. These characters gave the Wonder Woman a degree more of levity while also allowing the writers to focus on some issues which were more related to women. When Marston left the character, the strong driving force of the character to act as a strong moral guide and role model for female readers left as well and the character became more sensitive to the forces driving the industry as whole. Thus Wonder Woman changed somewhat to a more stereotypical woman. Her main interest was not always fighting crime, but for a time it became all in the interest of keeping Steve Trevor happy and interested in her for marriage. Also the backup stories featuring the Wonder Women of History were slowly phased out and replaced with features on marriage customs from around the world and trivial facts on random household objects.
During Marston's run, Diana Prince was the name of an army nurse whom Wonder Woman met. The nurse wanted to meet with her fiancé, who was transferred to South America, but was unable to arrange for money to do so. As Wonder Woman needed a secret identity to look after Steve (who was admitted to the same army hospital in which Diana Prince worked), and because both of them looked alike, Wonder Woman gave the nurse money to go to her fiancé in exchange for the nurse's credentials and took Diana Prince as her alias. She started to work as an army nurse and later as an Air Force secretary.
Perhaps due to her Amazonian background, Diana greatly respects other noble selfless warriors, as evidenced when she attended Superman's funeral in Smallville and spoke of how he had been much more than a soldier (adding to what Batman said about Metropolis burying an empty casket). As a result of her great posthumous respect, she was, therefore, more than willing to aid Batman in honoring the heroic death of Superman, by helping round up the metahumans from Lex Luthor's files to form a team of superheroes (later known as the Justice League) to protect the world from the imminent mysterious alien invader Steppenwolf and his Parademon minions after Superman's death left the world vulnerable.