By the mid-1960s, the political and social terrain on which the Urban League worked had changed dramatically. The Pittsburgh-born children of southern black migrants had come of age and pushed hard against the color line in the city's economy, politics, and institutions. National headquarters and local branches across the country worried about the increasing black nationalist turn in African American politics. But the ULP had helped to establish the postwar groundwork and even models for the fluorescence and even militance of Pittsburgh's Civil Rights and Black Power struggles of the 1960s and early 1970s.