History|History of North and South America|History: America|United States|United States History 147 History|History of North and South America|History of the Americas|History: America|United States 96 Civil War period, 1861-1865|History|History of North and South America|History of the Americas|History: America|United States 29 American Civil War|Civil War period, 1861-1865|History|History of North and South America|History: America|United States 24 History|History of North and South America|History: America|Presidential Studies|United States|United States History 22 America|History|History of North and South America|History: America|Indians of North America|United States History 20 Colonial history (1607-1775)|History|History of North and South America|History of the Americas|History: America|United States 20 Colonial history (1607-1775)|History|History of North and South America|History: America|United States|United States History 20 America|History|History of North and South America|History of the Americas|History: America|Indians of North America 10 History|History of North and South America|History: America|Twentieth century|United States|World War I 10 History|History of North and South America|History: America|United States|World War I 10 Civil War period, 1861-1865|History|History of North and South America|History: America|United States|United States History 8 History|History of North and South America|History of the Americas|History: America|The Revolution, 1775-1783|United States 8 History|History of North and South America|History of the Americas|History: America 7 Auxiliary Sciences of History|Biographies|Biography|General|History|History of North and South America|History: America|United States|United States History 6 British America|Canada|History|History of North and South America|History of the Americas|History: America 6 History|History of North and South America|History: America|Late nineteenth century, 1865-1900|Presidential Studies|United States 6 History|History of North and South America|History: America|Presidential Studies|Revolution to the Civil War, 1775/1783-1861|United States 6 History|History of North and South America|History of the Americas|History: America|Latin America (General)|Latin America. Spanish America 5 History|History of North and South America|History of the Americas|History: America|United States local history 5 American Revolutionary War|History|History of North and South America|History: America|The Revolution, 1775-1783|United States 4 Catholic Church|Catholicism|Christian Denominations|Philosophy and Religion|Philosophy, Psychology, Religion|Religions and Theology 4 Diplomatic history. Foreign and general relations.|History|History of North and South America|History of the Americas|History: America|United States 4 History|History of North and South America|History of the Americas|History: America|Revolution to the Civil War, 1775/1783-1861|United States 4 History|History of North and South America|History: America|Presidential Studies|Revolution to the Civil War, 1775/1783-1861|United States|United States History 4 History|History of North and South America|History: America|Twentieth century|United States|United States History 4 History|History of North and South America|History: America|United States|Vietnam War 4 History|History of North and South America|History: America|United States|World War II 4 Caribbean area. Caribbean Sea|History|History of North and South America|History of the Americas|History: America|Latin America. Spanish America 3 General|History|History of North and South America|History of the Americas|History: America|United States 3