History 49 Politics and government 26 Biography 15 Foreign relations 13 National security 13 Armed Forces 12 World War, 1939-1945 12 Economic conditions 11 Military policy 9 Personal narratives, Australian 8 Campaigns 7 Economic policy 7 Asia 6 Defenses 6 Vietnamese Conflict, 1961-1975 6 Pacific Area 5 Sea-power 5 20th century 4 Australia 4 Management 4 Peace 4 Security, International 4 Study and teaching 4 Addresses, essays, lectures 3 Arms control 3 Balance of power 3 Campaign 3 China 3 Cultural relations 3 Diaries 3