Quick Wonder Woman origin re-cap:
Since the dawn of time, women have been brutally murdered by the ignorance of men. Some of these women's spirits have been converging to a secluded mystical location deep within the bowels of the Earth.
At the height of their power, the Greek gods were in turmoil, for Ares, god of war, was getting more and more powerful. The goddesses, led by Athena and Artemis, set out to create a chosen race of women, whose ways would teach tolerance and friendship to the world of men. Into the bowels of the Earth they went, to the place called Gaea's Womb. From the spirits of murdered women there, they created the Amazons. But one spirit remained.
The Amazons became isolationist, though, and eventually fell prey to Herakles and his army. The ravaged Amazons escaped at night, killing their captors with much bloodshed. For that, they were ordered by the goddesses to set out for the island of Themiscyra, where they would stand watch over the demonic forces held beneath it.
Thousands of years later, the mystical storm that shielded Themiscyra from Patriarch's World was pierced by an aircraft, which crashed not far from the island. The pilot, USAF pilot Diana Trevor, survived and was washed ashore. She soon heard sounds of battle and raced forth to help. She joined the Amazon warriors in containing the demons at the gates beneath Themiscyra, but lost her life in the process. In her honor, the Amazons fashioned a ceremonial armor based on the insignias she was wearing.
Hypollita, Queen of the Amazons, felt a longing. The oracle told her that in her previous life, Hypollita was pregnant when she was murdered, and now her spirit longs for motherhood. So the goddesses bid her sculpt a baby out of Themiscyra's clay. And into this clay body their poured the final spirit held within Gaea's Womb. Hippolyta gave her the name of the outlander that gave her life in defense of Themiscyra: Diana.
As she grew, Diana became stronger, faster and determined. When the call was sent forth by the oracle that a champion had to be chosen among the Amazons, Diana concealed her identity and competed, against her mother's wishes. And she won. She was given the armor crafted in honor of her namesake, Diana Trevor. From Olympus, Artemis sent her a special weapon, a lasso of gold, forged from the girdle of Gaea, whose fires burn through lies and reveal the truth.
So armed, Diana went into the Underworld to battle Ares. This battle eventually brought her to Patriarch's World, to the american city of Boston, where the newspapers dubbed her Wonder Woman, due to the 'W'-shaped eagle on her armor.
After slaying the god of Terror, Deimos, and defeating his brother Phobos, God of Fear, Diana eventually faced Ares himself, even as Ares-controlled puppets on both the US and Russian armies were ready to launch a nuclear armageddon upon the world.
Being no match phisically for the God of War, Diana desperately tied her lasso around Ares, so he would see the result of his actions. The nuclear war would wipe the Earth of all life. Ares would sit supreme over a world of ashes, before crumbling to dust from lack of worship.
Wiser from the vision, Ares let Diana go, warning her that if she cannot make humans change their warlike ways, then his touch would be felt again.