sentences:  When Parcells returned to the Giants as defensive coordinator under Ray Perkins in 1981, he brought the 3–4 defense with him.Bill Belichick was initially exposed to the 3–4 defense while working as an assistant under Red Miller, head coach of the Denver Broncos and a former Patriots offensive coordinator under Fairbanks.Joe Collier was the defensive coordinator under Red Miller at the time, and his Orange Crush Defense was very successful at stifling opposing offenses.