Green beret
U.S. Special Forces wear the green beret as a distinction of excellence and uniqueness within the Army.
United States Army Special Forces in popular culture
Robin Moore successfully completed the courses and was allowed to live with the soldiers in Special Forces and their South Vietnamese, Montagnard, and Nung allies. His book, "The Green Berets", was published in 1965, but, because he mentions the American presence in North Vietnam and Cambodia, he published "The Green Berets" as a novel. The U.S. Army was upset by the book; the reading public was not and it became a best selling book, especially its paperback edition in 1966.