They were the most highly classified covert operations unit of the Vietnam War. The Studies and Observations Group (SOG) consisted of volunteers from the United States' most elite units. Amateurs they were not.
Their targets were enemy strong points on the Ho Chi Minh Trail into Laos and Cambodia. Using clandestine techniques such as prisoner snatches, they inflicted a relentless and unforgiving war on the Vietcong. But it wasn't all smooth-running for the SOG. Casualties mounted on both sides as the SOG's aggression was matched by the fearsome Vietcong's.
