Arena Football, also known as Indoor Football was developed in the 1980s as an 8-man form of Indoor Football. After an initial few seasons where the game was developed with a 4 team league, a full seasons League with eventually over a dozen teams was developed in the 1990s which was considered by the Wall Street Journal to be a fifth major.
The Arena Football League over-expanded in the 2000s with a Minor League, and its importance (and number of teams) waned, but there is now Arena Leagues all over America, all of which would now be considered Minor League or Semi-Pro.
AAA Arena Football Leagues (Decade / Era Overviews):
Final Tables & Playoff Results organised on a decade-by-decade or era-by-era basis:
Arena Football League (AAA National Leagues):
Legends Football League (Overviews):
World Arena Leagues (Overviews):
AAA Arena / Indoor Football Leagues (Seasons)
Results & Standings organised on a season-by-season basis. The AA Arena Football League Season Overviews give the Final Standings of each of the Leagues for the given years (i.e. all 2-3 AAA Arena Leagues per year). The League Seasons give just that Leagues Results & Standings for the given year i.e. National Arena League 2019 gives just the 2019 season results and Standings for the NAL.
Arena Football League (Seasons):
Legends Football League | United States (Seasons):
China Arena Football League (Seasons):