Penthesilea was the daughter of Orithia and Ares. She was known for her bravery, her skill in weapons and her wisdom. During a hunt, she killed her sister, Hippolyte II. She was so filled with grief that she set out for Troy (which she liberated), but Achilles retook it. Penthesilea's Amazons fought for Troy again. Since she was the daughter of Ares (God of War), she was able to kill many warriors at Troy, including Machaon and the great Achilles. Penthesilea fell at Troy.