World War, 1939-1945 79 Campaigns 51 History 44 Soldiers 34 Vietnam War, 1961-1975 28 Aerial operations, American 18 Iraq War, 2003-2011 16 World War, 1914-1918 15 Regimental histories 14 Prisoners of war 12 Officers 10 Marines 7 Medical care 7 Veterans 7 Afghan War, 2001- 6 Armed Forces 5 History, Military 5 Bomber pilots 4 Japanese Americans 4 Journalists 4 Korean War, 1950-1953 4 Medical personnel 4 Prisoners and prisons, German 4 Prisoners and prisons, Japanese 4 Social conditions 4 Tank warfare 4 Argonne, Battle of the, France, 1918 3 Fighter pilots 3 Forced removal and internment, 1942-1945 3 Literature and the war 3