World War, 1914-1918 32,047
History 4,635
Campaigns 3,981
Military campaigns 2,328
Guerre mondiale, 1914-1918 1,817
Soldiers 1,481
Economic aspects 1,327
Causes 1,308
War 1,175
Territorial questions 1,136
Regimental histories 948
Foreign relations 877
Peace 872
Economics 828
Naval operations 648
Politics and government 637
Finance 632
World War I 570
History, Military 541
Diplomatic relations 526
Diplomatic history 525
Military operations, Aerial 521
Atrocities 477
Armed Forces 473
Women 465
Aerial operations 462
Medical care 448
Religious aspects 442
HISTORY 430
Military operations, Naval 410
Biography 370
Social aspects 341
Hospitals 339
Weltkrieg 336
Campagnes et batailles 330
War work 330
Influence 326
Fiction 322
Reparations 312
Law and legislation 306
Literature and the war 298
Neutrality 297
International relations 288
Propaganda 285
Prisoners of war 284
Histoire 283
Food supply 273
Personal narratives 266
Military participation 251
Veterans 251
War and literature 248
Submarine 246
Battlefields 243
Jews 239
Sources 236
Economic conditions 235
Military 233
Personal narratives, British 229
Secret service 224
Debts, Public 219
Influence (Literary, artistic, etc.) 216
Public opinion 210
Monuments 209
Generals 208
Eerste Wereldoorlog 206
Prisoners and prisons, German 202
history 190
Erster Weltkrieg 184
Military Medicine 184
Western 180
Socialism 179
Poetry 172
Historiography 171
War memorials 170
History and criticism 168
Officers 162
Economic history 158
Description and travel 154
Weltkrieg (1914-1918) 154
Aerial operations, British 150
Psychological aspects 149
Refugees 149
Prisoners and prisons 147
Naval operations, German 145
Casualties 143
Fighter pilots 143
German 143
Hospitals, charities, etc 142
Nationalism 140
Boundaries 137
Social conditions 134
Somme, 1st Battle of the, France, 1916 134
Colonies 133
British 132
Aeronautics, Military 131
Naval operations, British 131
Personal narratives, French 128
Working class 128
Personal narratives, German 126
Travel 124