History 29 International relations 18 Leadership 16 Politics and government 12 Management 11 World War, 1939-1945 11 World politics 11 Foreign relations 9 Juvenile literature 9 Biography 8 Armed Forces 7 Diseases 7 Fiction 7 Terrorism 7 Military art and science 5 Psychological aspects 5 Success in business 5 Economic policy 4 Handbooks, manuals, etc 4 Military policy 4 Personnel management 4 Surgery, Operative 4 United States 4 War 4 Campaigns 3 Chemistry 3 Command of troops 3 Communication in management 3 Criminal law 3 Decision making 3