Vietnam War, 1961-1975 1,890 History 436 Politics and government 198 Veterans 184 Protest movements 158 Foreign relations 131 Influence 87 more ... Aerial operations, American 80 Social aspects 61 Soldiers 57 Social conditions 53 Campaigns 50 Political aspects 48 Public opinion 48 History and criticism 47 Psychological aspects 47 Agent Orange 46 Literature and the war 44 Atrocities 38 Health aspects 37 Toxicology 36 Korean War, 1950-1953 35 Diplomatic history 33 Peace 32 Political activity 32 Peace movements 31 World War, 1939-1945 31 Prisoners of war 30 Military policy 28 Officers 28 less ...