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.
The girl who wondered has seen wonders... has become a woman who has traveled the world, who has traveled worlds! A woman who has touched countless lives, has made them better in ways beyond measure. A woman who has brought hope, and joy, and love. A woman who is the hero of so many. The truth of you has never changed, Diana. Even the gods themselves could not take that from you. Why would we? It's one of the many reasons we love you.
Although she has traditionally paired with either Steve Trevor or no one as a main romantic lead, and Superman with either Lois Lane or Lana Lang, there has often been the hint of a romance between the two characters. This began in the 1960 in the series Superman's Girlfriend, Lois Lane which was equal parts romance and action themed. In order to drive along the romance, the theme often came up of Lois Lane believing that Superman really loved Wonder Woman (though this was mostly for the purposes of a case.) In later years the same ideas perpetuated though most in imaginary stories or alternate tellings of the future. Following Crisis on Infinite Earths the characters were briefly linked romantically in Action Comics #600 which was written by John Byrne. Subsequently the characters' interest in one another was generally portrayed as a strong friendship (this occurred under different writers, primarily Messner-Loebs and Rucka.) Following the reboot of the DC universe into the new 52 the characters once again showed a romantic interest in one another. They found common ground in the isolation which their power give them and shared a kiss in Justice League #12 in 2012. It was later on revealed by Geoff Johns that their relationship wouldn't last for long and will end badly.
With Wonder Woman arriving in pursuit, Strife warned of the prophecy Apollo and Artemis feared: a child of Zeus would kill a god to take the throne. That child could be either Diana or Zola's child. Sending Zola back with Hermes to have her baby in peace, Diana warned that if they were not left alone, she would fulfil the prophecy herself. Unfortunately, upon her return to Michigan, Diana found that Hermes had betrayed them, and once Zola gave birth to her son, he whisked the child away, and gave it to Demeter. Diana swore to get the boy back and bring Hermes to justice.