The Scottish Football League ("SFL") was established in 1890, initially as an amateur league as professionalism had not been legalised in Scottish football. In 1893 a Second Division was formed, with the existing single division renamed the First Division. The Second Division was discontinued during the First World War but revived in 1921. A Third Division was added in 1923 but collapsed three years later as a number of its member clubs found themselves unable to complete their fixtures for financial reasons, with many folding altogether. After the Second World War the divisions were rebranded as Division A and Division B and a Division C was added. This included a mixture of new member clubs and the reserve teams of clubs from the higher divisions, but this division was dropped in 1955.