there were no divisions
No, there are eight divisions in the NFL. The NFC North, South, East and West, and the AFC North, South, East and West.
East West North South
East West North South
Ethnic Distribution Map
A "geopolitical" map.
The NFL realigned divisions in 2002 when the Houston Texans started play. The Buccaneers moved from the NFL Central to the NFL South.
The three grand divisions are west, middle and east Tennessee. They're in order from left to right on your map.
None of them. The AFC has 4 divisions of 4 teams each and the NFC has 4 divisions of 4 teams each.
In 2002 the NFL realigned the league because of the addition of the Houston Texans. Prior to 2002, there were 31 teams in the NFL. With the addition of the Texans, there were now 32 teams. 16 teams in each conference, 4 teams per division, the NFL split up the league into the new order, trying to preserve as any regional and historical rivalries as possible.
The NFL is divided into 2 conferences. The 2 conferences are each divided into 4 divisions. NFL AFC NFC North South East West North South East West
Actually, there are eight stars, representing the league's eight divisions.