The All-American Football Conference...
was a professional American football league that challenged the established National Football League (NFL) from 1946 to 1949. One of the NFL’s most formidable challengers, the AAFC attracted many of the nation’s best players, produced one of pro football’s greatest teams, and introduced many lasting innovations to the game. However, the AAFC was ultimately unable to sustain itself in competition with the NFL. Three of its teams were admitted to the NFL, of which two survive today.