A 'selected group' is a term used to describe a small group of people who have been chosen for a specific purpose. The two most common terms used to refer to a selected group are 'CADRE' and 'POSSE.' A CADRE is a group of people with specialized training or knowledge, often in the military or political context. A POSSE is a group of people who have been deputized by a law enforcement officer to help apprehend a suspect.