When there was a battle to be fought, these warriors were there: gladiators, conquistadors, ninjas, Vikings . . . From Roman arenas to the lawless high seas, this series for readers age 12 and up spotlights the world's most fearsome combatants. Each title surveys the history of a fighting group, examining key leaders, weapons, skills, rules of warfare, and reasons for existing. United under the leadership of Genghis Khan, the Mongol empire reigned as the largest contiguous empire in history between about 1206 and 1368. Protecting that empire and conquering lands to help it grow were its ferocious horse-riding warriors, revered for being expert archers in battle and masters of deception and espionage. This title for readers age 12 and up surveys the history of the nomadic fighters. It covers key leaders, weapons, combat skills, and rules of warfare. Includes a glossary, sidebars, index, and further resources.