Belgian First Division B

The Belgian First Division B (officially known as Proximus League) is the second-highest division in the Belgian football league system, one level below the Belgian First Division A. It was created by the Royal Belgian Football Association in 2016, replacing the Belgian Second Division.
History.
The Belgian First Division B was created in 2016 as the successor of the Belgian Second Division following an overhaul of the Belgian football league system which saw the number of professional clubs reduced to 24 and the number of teams at the second level of the football pyramid to 8.
During Belgian Second Division era from 1973 to 2016, the second division winner and the play-off winner promote to the first division. From 2016 on, the second division winner is no longer guaranteed promotion. The league is divided in two periods of 15 games. The winners of a period compete each other in a final. If a team wins both periods, no final is played and it automatically rises to the highest level. In 2017, Lierse became champion of the league, but no promotion was allowed because they did not win a period. Antwerp and SV Roeselare played the final.
Competition format.
Until 2020.
From its inception in 2016 until 2020, the season consisted of two separate competitions in which all 8 teams played each other twice. The winners of both competitions faced each other in a two-legged playoff with the winner crowned champions and promoted to the Belgian First Division A. 
For the remaining teams, until 2019, the top three teams (excluding the promoted team), played together with the teams finishing in the positions 7 through 15 of the Belgian First Division A in a playoff for a ticket into the UEFA Europa League. The remaining four teams played a relegation playoff, with the last team relegating into the Belgian First Amateur Division. From 2019, the top six teams all took part in the Europa League playoffs (including the promoted team), with only the bottom two teams playing the relegation playoff in which they play each other five times.
From 2020.
The 2020–21 will no longer see two separate competitions, but rather one quadruple round-robin league in which all teams play each other four times. At the end of the season, the top-ranked team will be crowned champions and promoted, while the second-placed team will play a two-legged promotion playoff against the 15th-place finisher from the Belgian First Division A. The team finishing in last place will be relegated to the Belgian National Division 1 (renamed from "Belgian First Amateur Division").