History HISTORY 75 General 56 Gettysburg, Battle of, Gettysburg, Pa., 1863 40 Social conditions 35 State & Local 31 African Americans 28 more ... Race relations 28 SOCIAL SCIENCE 27 Politics and government 21 Middle Atlantic (DC, DE, MD, NJ, NY, PA) 20 POLITICAL SCIENCE 20 Social aspects 18 BIOGRAPHY & AUTOBIOGRAPHY 16 New England (CT, MA, ME, NH, RI, VT) 16 Social life and customs 16 Indians of North America 14 Economic conditions 13 BUSINESS & ECONOMICS 12 Campaigns 12 Colonial Period (1600-1775) 12 Education 12 Military campaigns 12 Soldiers 11 Church history 10 Quakers 10 Immigrants 9 Slavery 9 Antislavery movements 8 Cultural assimilation 8 less ...