All-American Girls Professional Baseball League
The All-American Girls Professional Baseball League was founded in 1943 due to fears that men’s baseball leagues would collapse as players were called up for service in World War 2. The league’s female players delivered an extremely high level of play, leading the rules of the league to transition from a game resembling softball to modern men’s baseball. Due to declining attendance, the league was disbanded in 1954. In 1992, the league was immortalized in the film A League of Their Own.