By one estimate, humans have fought wars in ninety-four out of every hundred years for the past 5,000. Despite radical differences in the prosecution of warfare between ancient and modern societies, there remains a linear connection to the ways that Greco-Roman cultures thought about war--its conduct, aims, tactics, and ethics. This is epitomized most obviously in the Greek and Latin derivatives that dot our language of war--"army,"military, "strategy." Combining astute analyses of the logistics of conflict with the ethics of war, Alfred Bradford offers fascinating parallels between warfare...