The 14th Gemina Martia Victrix Legion was the most celebrated unit of the early Roman Empire, a force that had been wiped out under Julius Caesar, reformed, and almost wiped out again. After participating in the a.d. 43 invasion of Britain, the 14th Legion achieved its greatest glory when it put down the famous rebellion of the Britons under Boudicca. Numbering less than 10,000 men, the disciplined Roman killing machine defeated 230,000 rampaging...