- "I'm one of the good guys and those are the bad guys."
"What?"
"The germans. Come on, we need to get out of here."
"The germans?" - ―Steve Trevor and Diana Prince[src]
The Invasion of Themyscira was a conflict between the Amazons and a group of soldiers from the German Army of World War I, who found themselves in search of the spy Steve Trevor.
Background[]
- "From what I could tell, if Dr. Maru was able to complete her work, millions more would die, the war would never end. I was there to observe and report, nothing more, but I had to do something."
- ―Steve Trevor[src]

Trevor flees the Ottoman Military Installation with Maru's notebook.
During a mission in the Ottoman Empire, Captain Steven Trevor infiltrated the Imperial German Army as one of its pilots, flying alongside General Erich Ludendorff to an Ottoman Military Installation. There, Trevor discovered to his horror Dr. Isabel Maru's experiments with a new kind of mustard gas that used hydrogen as a base instead of oxygen. Knowing that if she finished her work, millions of innocents would die at the hands of this weapon, Trevor stole the notebook in which Maru recorded her progress, fleeing and detonating the base while being pursued by several German troops.[1]
Invasion[]
- "They have guns, right?"
- ―Steve Trevor to Diana Prince[src]

Aboard a Fokker Eindecker plane, Steve Trevor was attacked by the warship Schwaben, causing it to plummet and crash into the water surrounding the island of Themyscira. After a training session in which she unintentionally demonstrated her godlike abilities, Diana Prince visited the shores of the island, observing Trevor stuck in his plane and about to drown. Prince quickly went out to sea to rescue Trevor and brought him to shore. However, the Germans who were still pursuing Trevor entered the magical barrier that hid Themyscira from the outside world, discovering Trevor there.

Antiope and her troops arrive at the battle.
As the Germans headed for the shores of Themyscira, the Amazons led by Queen Hippolyta arrived at the shores of the beach, trying to stop the Germans from advancing on land with fire-lit arrows. At that, several Amazons descended from the hills, some of them being shot and killed, while Prince watched in hiding. As the fight escalated, Antiope arrived along with a troop of cavalry, resulting in a fierce fight in which the Amazons made use of their combat skills and weapons, outnumbering and finishing off most of the Germans. Inspired by Antiope, Trevor joined the fight, making use of a German shotgun, only to watch in shock as Antiope used a shield to jump over it and shoot the Germans from behind.

When a distracted Prince, who had also joined the fight, was about to be killed by a German, Antiope rushed to intercept the shot, sacrificing herself to protect her. Trevor then quickly killed the soldier who shot Antiope, before rushing to Prince's side. In her dying state, Antiope revealed to Prince that she was the weapon known as the God Killer and urged her to leave Themyscira, though she was initially unable to understand it. With the Germans defeated, Trevor was blamed for luring the invaders to Themyscira, and was nearly killed by Hippolyta. However, Prince stopped her mother, revealing that he had fought alongside her against the Germans. When Trevor refused to reveal his intentions, the Amazons suggested killing him until Philippus claimed that if they killed him, they would never know who the invaders were.[1]
Aftermath[]
- "War? What war?"
"The war... The war to end all wars; four years, twenty seven countries, twenty five thousand dead, soldiers and civilians. Innocent people... women and children slaughtered. Their homes and their villages, looted and burned. Weapons far deadlier than you can... ever imagine." - ―Diana Prince and Steve Trevor[src]

Trevor is interrogated with the Lasso of Hestia.
Shortly afterward, Steve Trevor was taken by the Amazons to the Themyscira Throne Room, where he was subjected to the Lasso of Hestia in order to gain answers. Forcing him to reveal the truth to them, Trevor explained how humanity was waging a great war unlike anything they had ever seen before, revealing that Doctor Isabel Maru was inventing weapons that could wipe out the entire world. This revelation was what convinced Diana Prince that the God of War, Ares, was responsible for orchestrating the war. Armed with Amazonian weapons, Prince set out for the outside world with Trevor tasked with defeating Ares and the war.[1]