Genghis Khan is a name known throughout history, often associated with brutal conquest. But who was the man behind the legend? National Geographic's "Genghis Khan: The Secret History of the Mongols" delves into the complex story of one of the world's greatest conquerors. Based on the oldest surviving Mongolian literary work, this series uses powerful reenactments and expert analysis to bring the 13th century to life. Witness his incredible journey from a young outcast struggling for survival on the harsh Mongolian steppe to the visionary leader who united warring tribes. The show explores the strategist, the lawmaker, and the man who forged an empire that would forever change the world. The series has ended, but sign up for a reminder just in case it returns.