World War, 1914-1918 History 900 Politics and government 277 Campaigns 266 Foreign relations 187 World War, 1939-1945 181 Causes 175 more ... Literature and the war 152 History and criticism 145 International relations 145 Influence 142 Social aspects 142 Economic aspects 141 Social conditions 120 Peace 103 Diplomatic history 92 Women 88 Soldiers 85 Territorial questions 84 Military campaigns 83 War 78 History, Military 67 Regimental histories 58 Economic conditions 57 Medical care 54 Finance 51 Veterans 50 Psychological aspects 42 War and society 42 Armed Forces 40 less ...