Although she initially forbids Diana to be trained as a warrior, Hippolyta reluctantly agrees to let General Antiope, Hippolyta's sister and Diana's aunt, train her, only more rigorously than any other warrior. In 1918, Diana, now a young woman, rescues US pilot Captain Steve Trevor when his plane crashes off the Themysciran coast. The island is soon invaded by German soldiers that had been pursuing Trevor. The Amazons kill the crew, but Antiope sacrifices herself to save Diana. Steve is interrogated with the Lasso of Hestia and reveals that a great war is consuming the outside world and that he is an Allied spy. He has stolen a notebook of the chief chemist Dr. Isabel Maru, who is attempting to engineer a deadlier form of mustard gas under the orders of General Erich Ludendorff from a weapon facility in the Ottoman Empire. Believing Ares to be responsible for the war, Diana arms herself with the "Godkiller" sword, the lasso, and armor before leaving Themyscira with Steve to locate and stop Ares for good.
Suddenly, Zola and the others were attacked by Artemis, who was sent by Apollo to kill Zeke, Zola's son. While Zola and the others escaped with Zeke, Wonder Woman took on Artemis by herself. Diana defeated Artemis and went to protect Zola and the others, while Ares took the defeated Artemis back to Apollo. However, the First Born and Cassandra, two of Zeus' illegitimate children, attacked Zola. Wonder Woman, Lennox and Orion worked together to fight the First Born, but he proved to be stronger than they had anticipated. Orion's Astro Harness incapacitated Cassandra, and Orion opened a Boom Tube so that Wonder Woman and her allies could escape. The First Born attempted to pry the Boom Tube open, but Lennox sacrificed himself so that the others could escape safely. Wonder Woman and her allies arrived at the other side of the Boom Tube and were greeted by Highfather, who explained that they were on New Genesis.
William Marston's earliest works were notorious for containing subversive "bondage and sapphic-undertones" subtext. Among Wonder Women's infamous catchphrases, "Suffering Sappho", was a direct reference to lesbianism. Fredric Wertham's Seduction of the Innocent referred to her as the "lesbian counterpart to Batman" (whom he also identified as a homosexual). After Marston's death in 1947, DC Comics downplayed her sexuality and feminist origin. Wonder Women, without Marston's creative direction, become more "traditional" superhero fair; the lesbian relationships and sexual imagery disappeared from the "Wonder Woman" comic, along with Wonder Woman's super powers. During the Comics Code Authority-decades since, Wonder Woman's subversiveness had been gradually stripped away; subsequent comic book writers and artists either didn't know know what do with her or barely hinted at Wonder Woman's erotic legacy. Similar to whitewashing, Wonder Woman's queerness and feminist identity throughout the latter half of the 20th century was never discussed and rendered "invisible" in adaptations in favor of the dominant sexism portrayal of women in comic books.
It was later retconned by Gail Simone that Wonder Woman's outfit design had Amazonian roots. During a flashback in Vol. 3, Hippolyta is shown issuing orders to have a garment created for Diana, taking inspiration from the skies on the night Diana was born; a red hunter's moon and a field of stars against deep blue, and the eagle breastplate being a symbol of Athena's avian representations.[volume & issue needed]