World War, 1914-1918 1,978 History 699 Campaigns 388 Guerre mondiale, 1914-1918 191 Politics and government 152 Causes 135 Foreign relations 128 more ... World War, 1939-1945 124 Soldiers 121 Influence 82 Diplomatic history 71 Peace 69 Literature and the war 68 Histoire 67 Siena Donor: Murray, Jane 65 Weltkrieg 61 History and criticism 59 Social aspects 55 Naval operations 53 Social conditions 53 Aerial operations 52 Regimental histories 49 History, Military 48 Economic aspects 43 Siena Donor: Vallely, M.L.S., John R. 42 War 36 Women 35 Fiction 33 Eerste Wereldoorlog 31 Fighter pilots 31 less ...