The American Professional Football Association (APFA) was established in 1920 and is recognized as the precursor to the National Football League (NFL). The league was formed to create a more organized structure for professional football in the United States, featuring teams from various cities. In 1922, the APFA changed its name to the NFL, which has since grown into one of the most popular sports leagues in the country. The league has played a significant role in shaping the culture of American sports and has produced numerous legendary players and teams throughout its history.