Bryan O’Neal has spent two decades grinding his way up the U.S. Army ranks, from lowly private to command sergeant major — the highest rank for a non-commissioned officer. He could write a textbook on modern warfare history — and his own unique place in it — but much of what he’s seen and done could be hard for anyone to hear. Significant numbers of the men and women under his command weren’t even born until after the Sept. 11, 2001, terrorist attacks that inspired him to enlist.

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In the spring of 2004, perhaps the last thing President George W. Bush’s administration needed was another war-related PR problem. No one could find Iraq’s weapons of mass destruction, which the administration had used to build a case for war. Less than a month before Tillman’s death, four contractors for the Blackwater private security firm in Iraq were ambushed and dragged through the streets, and their corpses were hung from a bridge. In April came shocking images of torture at the Abu Ghraib prison.

A friendly fire death, a platoon’s 20 years of trauma

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