On January 15th, 1967 the AFL and NFL went head to head for the first time in a national championship.

 

Sources

The First Super Bowl Half-Time Show Rocket Men

Super Bowl I: Half-Time Show

NFL Network Ad for Super Bowl I: The Lost Game

CNN: The Lost Footage of Super Bowl I

NFL Network: Super Bowl I: The Mystery of the Lost Tapes

NFL Network: Super Bowl I: The First AFL-NFL Championship Game | Chiefs vs. Packers

The New York Times: Out of a Rare Super Bowl I Recording, a Clash With the N.F.L. Unspools