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. Gladiators fought not for land or riches but for the violent, bloody entertainment of the emperor and people of Ancient Rome. Slaves, criminals, hostages, and occasional volunteers faced each other in amphitheater battles for one purpose: to kill or be killed. Strong and well-trained, they were the equivalent of modern-day sports heroes. This title for readers age 12 and up surveys the history of the warriors. It covers key fighters, weapons, combat skills, and rules of warfare. Includes a glossary, sidebars, index, and further resources.