"Soldiers may be wounded in battle and sent to a hospital. A hospital isn't a shelf. It's a place of repair. And a soldier in the spiritual army is never off his battlefield. He is only removed to another part of the battlefield when a wound interrupts what he was meant to do, and sets him doing something else."

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There is more to military units than hardware. There is the character of the unit's personnel: their strengths, experience, and knowledge, their ability to get along and work together amid the horrors of the battlefield. There is an almost undefinable quality. That quality is the Marine Corps' secret weapon. Their edge. That quality is their ethos.

— Tom Clancy