World War, 1914-1918 History 327 Campaigns 116 Social aspects 61 Influence 58 World War, 1939-1945 58 Politics and government 52 more ... Soldiers 44 Social conditions 43 Literature and the war 42 Foreign relations 41 History and criticism 37 History, Military 36 Causes 30 Regimental histories 28 Diplomatic history 27 Women 23 War and society 21 Historiography 20 Medical care 20 Peace 20 Economic aspects 14 Naval operations 14 Veterans 14 Aerial operations 13 Collective memory 13 Political aspects 13 Neutrality 11 Propaganda 11 Religious aspects 11 less ...