Immediately after the attacks on September 11, 2001, the United States government initiated a secret war against Afghanistan, deploying fewer than one hundred Special Forces troops to fight back. Building a coalition with the rebels of the Northern Alliance, the US troops faced off against the Taliban and the terrorist organization al-Qaeda. They succeeded in driving both out of power by the end of 2001 with minimal casualties and without conventional, large-scale military operations. Despite this victory, the U.S. and its allies soon became mired in a seemingly never-ending war. This untold story features unprecedented access to the Green Berets who played pivotal roles in these covert missions. Reflecting on their experiences and on the brothers-in-arms they lost, these elite soldiers offer a riveting celebration of valor and a sobering, cautionary tale. LEGION OF BROTHERS is produced by CNN films and directed by Greg Barker ("Manhunt").