The Soviet First League in football () was the second highest division of Soviet football, below the Soviet Top League. While the second tier competitions in football among "teams of masters" (an official term for the Soviet professional clubs) existed since 1936, the First League has been officially formed in 1971 out of the Class A First Group. It followed the transitional 1970 season when the Class A was expanded to three groups (Vysshaya Gruppa, Pervaya Gruppa, Vtoraya Gruppa) and discontinuation of the Class B competitions for the 1971 season. The league existed until the dissolution of the USSR in 1991. Overview The second tier competitions and predecessors of the First League has been known as Group B, Group 2, Class B, and Class A, group 2. The number of teams playing at this level fluctuated significantly during the history of Soviet football. In 1940s-1970s the league frequently consisted of several groups. The group winners qualified for the final tournament. The second tier competitions among "teams of masters" existed since 1936 as part of four groups of eight All-Union competitions where each group represented a tier with Group A representing top tier, Group B representing second tier, Group V representing third tier and so on. Before the World War II the season competitions were inconsistent in every group. Since after the World War II there existed only top two tiers for football competitions among "teams of masters". The top tier was called Pervaya Gruppa (First Group) and the second tier Vtoraya Gruppa (Second Group). In 1950 those tiers were renamed with the second tier competitions being renamed into the Class B (the top tier became the Class A). In 1960 Class B competitions were transformed into regional competitions with separate competitions for Russia, Ukraine, and other republics. More transformations took place in 1963 when the second tier competitions were included in the Class A competitions, while the Class B competitions were shifted to the third tier for 1964 season, thus reviving the third level competitions. Following the 1963 reform, the second tier competitions became the Vtoraya Gruppa Classa A (Class A second group) and the top tier being renamed as the Pervaya Gruppa Classa A (Class A first group). The Vtoraya Gruppa did not have multi groups competition with only one group round robin tournament. After the 1970-1971 reforms there was established the Soviet First League with a single group