African Americans Ohio River Valley History 19th century Antislavery movements Ohio River Valley History 19th century Fugitive slaves Ohio River Valley History 19th century Geschichte Ohiotal USA Underground Railroad Underground Railroad Ohio River Valley Schwarze Schwarze. USA Abolitionismus African American communists History 20th century African American labor union members History 20th century African Americans American Negro Labor Congress Antislavery movements Esclaves fugitifs - Ohio, Vallée de l' - Histoire - 19e siècle Fugitive slaves Gewerkschaft, Minderheitenpolitik Gewerkschaftsmitglied HISTORY / United States / State & Local / General Kommunistische Partei, Minderheitenpolitik Linksradikalismus Mouvements antiesclavagistes - Ohio, Vallée de l' - Histoire - 19e siècle National Association for the Advancement of Colored People National Negro Congress National Urban League Noirs américains - Ohio, Vallée de l' - Histoire - 19e siècle Ohio River Valley History 19th century Ohio, Vallée de l' - Histoire - 19e siècle