LRBW meaning in Academic & Science ?

The League of Revolutionary Black Workers (LRBW) formed in 1969 in Detroit, Michigan. The League united a number of different Revolutionary Union Movements (RUMs) that were growing rapidly across the auto industry and other industrial sectors—industries in which Black workers were concentrated in Detroit in the late 1960s and early 1970s. The formation of the League was an attempt to form a more cohesive political organ guided by the principles of Black liberation and Marxism-Leninism in order to gain political power and articulate the specific concerns of Black workers through political action. While the League was only active for a short period of time, it was a significant development in a time of increasing militancy and political action by Black workers and in the context of both the Black liberation and Marxist-Leninist movements in the United States.