World War, 1914-1918 History 973 Campaigns 324 Politics and government 275 Causes 218 Foreign relations 213 World War, 1939-1945 183 more ... Economic aspects 173 Influence 162 Social aspects 144 Peace 129 Diplomatic history 120 Social conditions 120 Literature and the war 117 Soldiers 117 History and criticism 115 Women 88 Medical care 84 Economic conditions 70 Territorial questions 66 Regimental histories 63 History, Military 59 Finance 56 World politics 53 Naval operations 52 Reparations 50 Veterans 48 Aerial operations 46 Historiography 44 War and society 43 less ...