Setting the scene
The AFL and NFL had agreed to merge, but their champions had never met on one field, and skeptics still questioned whether the younger league could compete with established NFL powers.
What happened
Super Bowl I—officially the AFL-NFL World Championship Game—was played on January 15, 1967, at the Los Angeles Memorial Coliseum, where Vince Lombardi's Green Bay Packers beat the Kansas City Chiefs 35-10.
Why it still matters
Green Bay's win helped sell the public on the merger and gave the new championship a credible first chapter before the "Super Bowl" name stuck. Memorable detail: tickets cost as little as $12, and the game was not a sellout.
Background
Green Bay's victory helped legitimize the merger that unified pro football.