Phobos returned alongside his sister Eris in alliance with Circe. Circe had amassed great power by bringing gods of various pantheons together. Among them were the Roman gods, who challenged the Olympians for their domain. It took much strength for Zeus to summon Hermes and Diana to New Olympus, where the gods had been trapped. Earth's heroes were able to turn the tide against Circe, but three gods died: Circe killed Hermes; Harmonia was killed by her sister Eris; and Eris herself was slain by Son of Vulcan. Zeus and the Olympians decided then to follow the call of Cronus and the Titans to help guide other worlds in the universe. New Olympus was left to the Roman gods.
(For the record, Marston and Olive Byrne’s son, Byrne Marston, who is an 83-year-old retired obstetrician, thinks that when Marston talked about the importance of submission, he meant it only metaphorically. “I never saw anything like that in our house,” he told me. “He didn’t tie the ladies up to the bedpost. He’d never have gotten away with it.”)
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.
Not long after this, Athena sensed a dark destiny for the gods amidst the cosmic mechanations of Alexander Luthor Jr.. In the crisis created by his chaos, Diana was forced to kill Maxwell Lord, and incurred the ire of the world's public. The U.S. government responded by mobilizing against Themyscira, and Diana realized that as long as she was a target, the Amazons would never be safe. Diana prayed to the gods to take the Amazons to safety, but got more than she bargained for. On Olympus, she pleaded against Athena's decision to remove the gods from Earth's affairs. Regardless, the gods departed, leaving Diana bereft of family and faith.