The standard mode of ancient warfare was hand-to-hand combat, a frightening drama in which individuals were at all times exposed to death from behind and to each side. Military leaders learned early on to form their soldiers into tight, cohesive ranks. Trusting his fellows on either side of him not to retreat and leave him exposed, a soldier could fight the man in front of him with more spirit and confidence. The Romans extended this strategy by placing the youngest, most impetuous fighters in the front ranks, the most experienced and best fighters in the rear, and everyone else in the center.
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