World War, 1914-1918 History 1,006 Campaigns 342 Politics and government 279 Causes 218 Foreign relations 214 World War, 1939-1945 185 mere ... Economic aspects 173 Influence 169 Social aspects 150 Peace 133 Literature and the war 121 Soldiers 121 Diplomatic history 120 History and criticism 120 Social conditions 120 Women 90 Medical care 84 Economic conditions 71 Territorial questions 67 History, Military 66 Regimental histories 65 Finance 56 Naval operations 56 Veterans 53 World politics 52 Reparations 50 Aerial operations 48 Historiography 47 War and society 47 mindre ...