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Super Bowl IV, played in 1970, marked the final championship game between the American Football League (AFL) and the National Football League (NFL) before their merger. The AFL, founded in 1959 as a rival to the NFL, introduced a more pass-oriented and exciting style of play. This competition led to the creation of the AFL-NFL World Championship Game, later known as the Super Bowl, in 1967. Super Bowl IV saw the AFL champion Kansas City Chiefs defeat the NFL's Minnesota Vikings. The merger was fully implemented in 1970, with AFL teams becoming part of the NFL's new American Football Conference (AFC).12

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