Army Special Forces got its start on June 19, 1952, and since then, its soldiers have been at the forefront of fights in Vietnam, Iraq, Afghanistan, and today, are advising US-backed forces inside Syria.
They call themselves the quiet professionals, and they are one of $4 in the world.
Their mission is unconventional warfare - taking small SF teams to train and lead guerrilla forces.
SF soldiers usually work together in a 12-man "A-Team," with each man holding a specific job: The ranking officer is the team leader, the weapons sergeant knows just about every weapon in the world, the communications sergeant tees up ordnance or extract, and the medics can take lives as quickly as saving them.
It may seem crazy to send only 12 guys into a hostile country, but it's not crazy when they are Special Forces.