Subject
History
World War, 1939-1945 Campaigns
113
United States Politics and government
102
Officials and employees
62
United States History, Military
59
Baseball History
57
United States Foreign relations
57
Criticism and interpretation
51
United States History
50
World War, 1939-1945
48
Vietnam War, 1961-1975
44
World War, 1939-1945 Regimental histories
44
World War, 1939-1945 Aerial operations, American
42
Baseball players
41
Criticism, interpretation, etc
38
Vietnam War, 1961-1975 Campaigns
38
Intelligence service History
34
Knowledge and learning
33
Aviation
30
Influence
29
World War, 1914-1918
29
United States History, Naval
28
Vietnam War, 1961-1975 Aerial operations, American
27
Korean War, 1950-1953 Campaigns
25
Missions
25
Aeronautics, Military History
24
Astronautics History
24
Iraq War, 2003-2011
24
Management
24
World War, 1914-1918 Campaigns
24
Cold War
23
United States History Campaigns
22
War on Terrorism, 2001-2009
22
African American troops
21
Great Britain Politics and government
21
Organization
21
Doctrines
19
Frontier and pioneer life
19
Iraq War, 2003-2011 Campaigns
19
Procurement
19
Appreciation
18
Officers
18
Political and social views
18
Vietnam War, 1961-1975 Naval operations, American
18
Constitutional history
17
Great Britain History
17
Historic sites
17
Military life
17
Railroads History
17
United States Military policy
17
more ...