Marine Corps Junior ROTC physical fit Cadets compete in competitions designed to test the strength, teamwork and physical and mental endurance of cadets from across the country.  Raider Competition or "Raider" as it is more commonly known is a very popular athletic competition held within Junior ROTC programs around the United States. One of the goals of the Raider program is to promote esprit de corps, teamwork, and self-confidence among JROTC cadets.  It is the Junior ROTC equivalent of the Army ROTC "Ranger" competition in college, only far less dangerous but very challenging as well! The events are held outdoors in state parks or large expansive wooded areas.