Jake Tapper exposes the origins of one of the Afghan War's deadliest battles for U.S. forces and details the stories of soldiers heroic and doomed, shadowed by the recklessness of their commanders in Washington, D.C. and a war built on constantly shifting sands.

"Veteran war correspondent Ann Scott Tyson first met Special Forces Major James Gant and heard about his battle renown when he was awarded the Silver Star several years ago. Soon after, in October, 2009, Gant rocked the US military establishment with his paper "One Tribe at a Time," an incendiary criticism of what he considered a gaping hole in U.S. strategy: The failure to engage Afghanistan's powerful Pashtun tribes on the eastern border with Pakistan....