History 53 Politics and government 32 Biography 18 Foreign relations 17 National security 13 Armed Forces 12 Economic conditions 12 World War, 1939-1945 12 Military policy 10 Personal narratives, Australian 8 Sea-power 8 Campaigns 7 Economic policy 7 Asia 6 Defenses 6 Foreign economic relations 6 Vietnamese Conflict, 1961-1975 6 Pacific Area 5 20th century 4 Addresses, essays, lectures 4 Australia 4 Congresses 4 International cooperation 4 Management 4 Peace 4 Security, International 4 Social conditions 4 Study and teaching 4 Arms control 3 Balance of power 3