The Chiefs won three AFL championships, in 1962, 1966, and 1969, and were the second AFL team (after the New York Jets) to defeat an NFL team in an AFL–NFL World Championship Game, when they routed the Minnesota Vikings in Super Bowl IV. That victory on January 11, 1970, was the final such competition before the leagues' merger went into full effect. The Chiefs were also the second team, after the Green Bay Packers, to appear in more than one Super Bowl (and the first AFL team to do so) and the first to appear in the championship game in two different decades.