Slagelse Boldklub & Idratsforening, commonly known as Slagelse B&I, is an association football club based in Slagelse, Denmark, that competes in the Danish 2nd Division, the third tier of the Danish football league system. Founded in 1887, making it the fifth oldest club in the country, it is affiliated to DBU Zealand. The team plays its home matches at Slagelse Stadium, which has a capacity of 10,000. Between 2008 and 2015, the club's first team went under the name of FC Vestsjalland.
History
The original club, Slagelse Boldklub, was formed on 23 May 1887, originally featuring cricket and later also association football. On 27 August 1919, it merged with Slagelse Idrats-Forening (founded 29 January 1907 at a meeting in the then "Schweitzer-Kafeen" on Schweizerpladsen with exclusively athletics on the program) under the current club name, Slagelse Boldklub & Idratsforening (Slagelse B&I), but the new joint board decided to keep the founding date of Slagelse Boldklub. Slagelse Boldklub, which had always been a member of the Danish Football Association (DBU), was involved in the formation of the local association Sjallands Boldspil-Union (SBU) in 1902, where the club's then chairman joined its first board. After being represented in SBU's then Mesterrakke since the 1931–32 season, the team managed to win the division in the 1937–38 season after two play-off matches in a local showdown against Western Zealand neighbours from Korsor Boldklub (rematch due to the same points; the series did not include goal difference yet). Thus, Slagelse secured promotion to nationwide divisions of the DBU for the first time in the club's history.
The Slagelse club made its first appearance in DBU's tournaments in the East group of the third-tier 3rd Series in the 1938–39 season, when Bornholm based IK Viking Ronne was defeated 6–0 at home on 21 August 1938. In the following years, the team reached promotion to the Danish top flight. During the German occupation of Denmark in World War II, Slagelse