James D. Smith/Dallas Cowboys FRISCO, Texas – There were times in the Cowboys' 61-year history when they were noted for their defense. Even earned the nickname "Doomsday Defense" back in the early 1970s, leading the Cowboys to consecutive Super Bowls, winning their first that 1971 season. They even emerged with a second-coming of "Doomsday" later that decade, "Doomsday II" leading the Cowboys to three Super Bowls in a four-year span and winning their second Lombardi Trophy that 1977 season. And while winning three Super Bowls in those four 1990s seasons, the majority of the attention centered on the Cowboys offense, you know, them "Triplets" comprised of Aikman-Smith-Irvin, with a Pro Bowl tight end named Novacek and an offensive line known as "The Great Wall of Dallas," the most glorified wall in Texas history.