National security 27 Foreign relations 25 World War, 1939-1945 20 Pacific Area 18 Campaigns 16 Congresses 13 Strategic aspects 13 Politics and government 12 Security, International 10 Economic conditions 9 Asia 8 Sea-power 8 Defenses 7 Foreign economic relations 7 Military policy 7 History 6 Biography 5 Pacific Area cooperation 5 Dictionaries 4 Peace 4 Commerce 3 Commercial policy 3 Economic policy 3 Naval strategy 3 Personal narratives, American 3 Relations 3 World politics 3 Aerial operations, Japanese 2 Army 2 Asian cooperation 2