Between 1968 and 1971 , the BPP was one of the most important black organizations in the country .
Between 1968 and 1971 , the BPP had support from the NAACP , SCLC , Peace and Freedom Party , and others .
Between 1968 and 1971 , the BPP was one of the most important black organizations in the country and had support from the NAACP , SCLC , Peace and Freedom Party , and others .