Genghis Khan

Not all kings lounge in lavish palaces while letting soldiers do the dirty work. These warrior kings got into the muck and did it themselves.

Nobody likes a bully, but as history proves, they're hard to escape. Wherever there's a chance to snatch power, tyrants come out of the woodwork, hoping to get a piece for themselves at any cost. From rulers who oppressed their subjects to warriors who let no one stand in their way, history has its fair share of bad guys—and none are worse than the ones here.

Not all kings lounge in lavish palaces while letting soldiers do the dirty work. These warrior kings got into the muck and did it themselves.

From the reign of Henry VIII to the conquests of Genghis Khan to the exploits of Bloody Mary, history's worst bullies take “brutal” to the next level.