Diana eventually confronts General Ludendorff, believing him to be Ares in disguise. She kills him, but the war does not stop. Confused and heartbroken, she is approached by , a peace negotiator she met in London. He reveals himself as the true Ares .

Ares explains that he doesn't force humans to fight; he simply whispers ideas and provides the tools, claiming that humanity is inherently corrupt and deserves destruction. As they battle, Steve Trevor realizes he must stop the bomber carrying the gas. In a final act of heroism, Steve tells Diana "I love you" and sacrifices his life by detonating the plane mid-air. The Power of Love

Embracing her true identity as the "Godkiller"—a child of Zeus—she channels Ares' own lightning against him, destroying the God of War. In the aftermath, the armistice is signed, and the war ends. In the modern day, Diana remains a secret protector of the world, having learned that only love can truly save it.

Witnessing Steve’s death triggers a primal rage in Diana, nearly leading her to embrace the darkness Ares desires. However, remembering Steve's selfless sacrifice, she realizes that while humans are flawed, they are also capable of great love.

The Amazons' isolation is shattered when a plane crashes into the Aegean Sea. Diana rescues the pilot, , an American captain and Allied spy. Close behind him is a fleet of German soldiers. A brutal beach battle ensues; while the Amazons prevail with bows and blades against modern rifles, they suffer heavy losses, including the death of Antiope.

Under the influence of the Lasso of Hestia, Steve reveals the horrors of the "War to End All Wars." Believing the conflict is the work of , the God of War, Diana defies her mother. She "borrows" the Godkiller sword, the Lasso, and her iconic armor to accompany Steve back to the world of men to end the slaughter. Into the Trenches