Green beret
The 10th Special Forces Group (Airborne) had many OSS World War II veterans in their ranks when it was formed in 1952. They began to unofficially wear a berets of varying colour while training. The color green became favored because it was reminiscent of the World War II British Commando-type beret. The 10th Special Forces Group (Airborne) deployed to Bad Tolz, Germany in September 1953. The remaining cadre at Fort Bragg formed the 77th Special Forces Group. Members of the 77th SFG began searching through their collections of berets and settled on the Rifle Green colour of the British Rifle Regiments (as opposed to the Lovat Green of the Commandos) from Captain Mike de la Pena's collection. Captain Frank Dallas had the new beret designed and produced in small numbers for the members of the Special Forces.
Robin Moore
Thanks to connections with Harvard classmate Robert F. Kennedy, Moore was allowed access to the U.S. Army Special Forces to write about this elite unit of the United States Army. It was General William P. Yarborough who insisted that Moore go through special forces training in order to better understand "what makes Special Forces soldiers 'special'." He trained for nearly a year, first at "jump school" for airborne training before completing the Special Forces Qualification Course or "Q Course", becoming the first civilian to participate in such an intensive program. Afterwards, Moore was assigned to the 5th Special Forces Group on deployment to Vietnam. His experiences in-country formed the basis for "The Green Berets", a bestseller that helped secure him international acclaim (see United States Army Special Forces in popular culture).