It began in 1971 when the Baltimore Ravens (then named the Colts) beat the Dallas Cowboys 16-13 to win the 1970 season. That game took the official name of Super Bowl V, which means Super Bowl 5.
Up With People, a musical entertainment touring group, performed the halftime show five times between 1971 and 1986. That included at Super Bowl X in 1976 for their "200 Years and Just a Baby ...