The United States Army has a long and distinguished history of producing top notch special forces groups, and one of the most famous - or infamous - is the 5th special forces group. Like many of their brother special forces, the 5th special forces group was formed during the Cold War. It was 1961 to be precise, and they operate out of Fort Campbell in Kentucky. Since that was the eve of the Vietnam War, and the Vietnam war is where the 5th special forces group was initially and most famously deployed, that is the conflict that, to this day, is still most largely associated with the 5th special forces group. Their history in that conflict is distinguished, and their homepage at http://www.groups.sfahq.com/5th/history_of_the_5th_sfg.htm gives that history in detail.