RasenBallsport Leipzig e.V., commonly known as RB Leipzig, is a German association football club based in Leipzig, Saxony. The club was founded in 2009 by initiative of energy drink-maker Red Bull GmbH who purchased the playing right of the fifth division side SSV Markranstädt with the intention of advancing the new club to the top-flight Bundesliga within eight years. Men’s professional football is run by the spin-off organization RasenballSport Leipzig GmbH.
In its inaugural season in 2009–10, RB Leipzig dominated the NOFV-Oberliga Süd (V) and was promoted as champions to the Regionalliga Nord (IV). RB Leipzig won the 2012–13 Regionalliga Nordost season without conceding a single defeat and was promoted to the 3. Liga (III), then finished the 2013–14 3. Liga season as runner-up and was promoted to the 2. Bundesliga (II) as the first team since the introduction of the 3. Liga to win promotion after only one season.