Initially known as Boscombe, the club competed in regional football leagues before going up from the Hampshire League to the Southern League in 1920. Now known as Bournemouth & Boscombe Athletic, they were elected into the Football League in 1923. They remained in the Third Division South for 35 years, winning the Third Division South Cup in 1946. Placed in the newly reorganised Third Division in 1958, they suffered relegation in 1970, but would win an immediate promotion in 1970–71. Relegated back into the Fourth Division in 1975, Bournemouth were promoted again in 1981–82 and after lifting the Associate Members' Cup in 1984 would go on to win the Third Division title in 1986–87. They spent three seasons in the second tier but entered administration in 1997 and ended up back in the fourth tier with relegation in 2002, though immediately gained promotion by winning the play-offs in 2003.