Historically, the toughest armies are made up of the fiercest warriors. Modern armies depend on technology and brainpower, but still require tough warriors. Over thousands of years, rulers have shaped their societies to produce brave fighters that will risk their lives for glory, honor, and victory. Weird History highlights eleven of history's fiercest fighting forces of the past and what they accomplished. Not all of them were official armies led by government rulers, but they all had a leader who knew how to motivate their fighters, whether by patriotism, rewards, fear, loyalty, cultural manipulation, or survival instinct. Or some combination of those techniques. Some you know about from history class or the movies, but there will be a couple of armies that are new to you.