Political Science|Political science (General)|United States Politics & Government 128 History|History of North and South America|History: America|United States|United States History 74 History|History of North and South America|History of the Americas|History: America|United States 50 Civil War period, 1861-1865|History|History of North and South America|History of the Americas|History: America|United States 16 Political institutions and public administration (United States)|Political Science|Political Science & Studies|United States 13 American Civil War|Civil War period, 1861-1865|History|History of North and South America|History: America|United States 12 Federal law. Common and collective state law|Law|Law of the United States 11 History|History of North and South America|History: America|Presidential Studies|United States|United States History 11 America|History|History of North and South America|History: America|Indians of North America|United States History 10 Colonial history (1607-1775)|History|History of North and South America|History of the Americas|History: America|United States 10 Colonial history (1607-1775)|History|History of North and South America|History: America|United States|United States History 10 Law|United States Law 9 Political Science|United States Politics & Government 9 Abstracting, Bibliographies and Statistics|Education|Higher Education|History of education|Theory and practice of education|United States 7 Education|Higher education|History of education|Theory and practice of education|United States 6 Law|Law of the United States 6 History|History of North and South America|History of the Americas|History: America|United States local history 5 History|History of North and South America|History: America|Twentieth century|United States|World War I 5 History|History of North and South America|History: America|United States|World War I 5 Law|Law of the United States|United States Law 5 Abstracting, Bibliographies and Statistics|Education|Individual institutions - United States|Secondary education. High schools|Theory and practice of education|United States 4 Abstracting, Bibliographies and Statistics|Education|Individual institutions - United States|Theory and practice of education|United States 4 Academic Testing|Education|History of education|School administration and organization|Tests and Measurements|Theory and practice of education|United States 4 Academic Testing|Education|History of education|Tests and Measurements|Theory and practice of education|United States 4 Civil War period, 1861-1865|History|History of North and South America|History: America|United States|United States History 4 Education|Higher Education|History of education|United States 4 History|History of North and South America|History of the Americas|History: America|The Revolution, 1775-1783|United States 4 Abstracting, Bibliographies and Statistics|Education|Higher education|Individual institutions - United States|Theory and practice of education|United States 3 Abstracting, Bibliographies and Statistics|Education|History of education|Secondary Education|Secondary education. High schools|Theory and practice of education|United States 3 Abstracting, Bibliographies and Statistics|Education|History of education|United States 3