It is notable as a successful independent league at a time when few existed, and was a haven for black and indigenous players excluded from organized baseball.
Like later incarnations of the league, it was the product of Canadian Pacific Railway sports promoter Joseph Page and retired Major League Baseball pitcher Jean Dubuc, who laboured extensively to set up teams in towns with Canadian Pacific stops.
In 1950 it rejoined the NAPBL as a Class C circuit, following a similar pattern to earlier successful independent organizations.
During this time, the opportunities it offered drew black players from across North America, and it even once included a team representing the Caughnawaga Mohawk reservation.
Other notable players included Maurice Richard, Pete Gray, Adrián Zabala, Roland Gladu, and a retired Félix Mantilla.