Green beret
U.S. Special Forces wear the green beret as a distinction of excellence and uniqueness within the Army.
The Green Berets (book)
Moore, a Harvard classmate of Robert Kennedy, wanted to write about the United States Army Special Forces. It was Special Forces founder General William P. Yarborough who insisted that Moore go through the "Q Course" in order to better understand what made Special Forces "special." Moore trained with the soldiers at Fort Benning and Fort Bragg for nearly a year, becoming airborne qualified. He then accompanied them on a deployment to Vietnam in 1963.