History 2,570 Regimental histories 455 Campaigns 267 Politics and government 180 Personal narratives 130 Soldiers 121 Histoire 90 more ... Pennsylvania Infantry 78 Slavery 74 Biography 70 Registers 65 Causes 64 Generals 62 African Americans 59 Prisoners and prisons 58 Naval operations 56 Gettysburg, Battle of, Gettysburg, Pa., 1863 51 Social aspects 46 Women 43 Sources 40 Registers of births, etc 37 African American soldiers 33 Officers 33 Hospitals 32 Confederate side 31 Poetry 31 Foreign public opinion 30 Genealogy 30 Militia 30 Enslaved persons 27 Participation, African American 27 Social conditions 27 Sermons 26 Veterans 26 Addresses, sermons, etc 25 Confiscations and contributions 25 Description and travel 25 History, Military 25 Presidents 24 Reconstruction 24 less ...