The All-America Football Conference (AAFC) 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.
The AAFC was the second American professional sports league (the first being the third American Football League) to have its teams play in a double round robin format in the regular season: each team had a home game and an away game with each of its AAFC "brethren."
The Cleveland Browns were the AAFC's most successful club, having won every annual championship in the league's four years of operation.
The AAFC was founded by Chicago Tribune sports editor Arch Ward on June 4, 1944. Ward was also the originator of baseball’s All-Star Game and football’s College All-Star Game.