World War, 1914-1918 History 9,252 Campaigns 4,265 Politics and government 2,877 Foreign relations 2,140 Causes 2,127 Economic aspects 1,631 more ... World War, 1939-1945 1,542 Soldiers 1,476 Literature and the war 1,192 Peace 1,071 Influence 1,064 Weltkrieg 1,042 History and criticism 1,002 Diplomatic history 987 Military campaigns 978 Territorial questions 971 History, Military 910 Regimental histories 868 Social aspects 801 War 797 Naval operations 726 Social conditions 697 Guerre mondiale, 1914-1918 685 Economic conditions 611 Women 566 Finance 558 Reparations 497 International relations 485 World politics 483 less ...