Bloodthirsty warriors who lived on the fringe of civilization, defied authority and terrorized the people of Europe, the Barbarians -- whose name still evokes images of cruelty and chaos -- led a much more complicated existence than many people know. This History Channel series chronicles the fascinating stories of the Vikings, the Goths, the Mongols and the Huns, tracing 1,000 years of conquest and adventure with extensive reenactments.