1861-1865 20thcentury africa africanamericancivilrights africanamericancivilrightsworkers africanamericans africanamericanstudies americanhistory:fromc1900- amerikaanseburgeroorlog architecture biography:general blackstudies c1800toc1900 citizenship civilrights civilrightsmovements civilwar civilwarhistory documentaries emancipation ethnicstudies general histor history history:american nonfiction peopleofcolor photoessays photographs:collections photography pictorialworks racerelations slavery unitedstatescivilwar usa