Vietnam War, 1961-1975 154 History 109 Foreign relations 58 Politics and government 39 Social conditions 29 Economic conditions 28 Vietnam Conflict 25 Social aspects 22 Indochinese War, 1946-1954 20 Veterans 19 Description and travel 15 Economic aspects 13 Women 13 Economic policy 11 Social life and customs 11 Agent Orange 10 Influence 10 Relations 10 Vietnamese 10 Soldiers 9 Economic development 8 Health aspects 8 Vietnamese Americans 8 Campaigns 7 Health risk assessment 7 Herbicides 7 Nationalism 7 Political aspects 7 Refugees 7 adverse effects 7 Communism 6 Travel 6 Atrocities 5 Emigration and immigration 5 Environmental Exposure 5 Ethnology 5 History, Military 5 Medical care 5 Military policy 5 Missing in action 5 Officers 5 Peace 5 Prisoners of war 5 Protest movements 5 Public opinion 5 Toxicology 5 Underground movements 5 Urbanization 5 Causes 4 Children 4 Colonization 4 Environmental aspects 4 Families 4 Folk music 4 Immigrants 4 Intellectual life 4 Orphans 4 Polychlorinated Dibenzodioxins 4 Regimental histories 4 Religious aspects 4 Rural conditions 4 Rural development 4 Social change 4 Vietnam War 4 history 4 Aerial operations, American 3 Agriculture 3 Casualties 3 City and town life 3 City planning 3 Civilians in war 3 Commerce 3 Dioxins 3 Diplomatic history 3 Entrepreneurship 3 Gender identity 3 History and criticism 3 History, 20th Century 3 Man-woman relationships 3 Management 3 Massacres 3 Mediums 3 Military assistance, American 3 Military nursing 3 Money 3 Moral and ethical aspects 3 Planning 3 Political activity 3 Popular culture 3 Postwar reconstruction 3 Poverty 3 Presidents 3 Prisoners and prisons, North Vietnamese 3 Psychological aspects 3 Religion and state 3 Spirit possession 3 Substance abuse 3 Transnationalism 3 War 3 War use 3