World War, 1939-1945 39 Campaigns 23 History 19 Prisoners of war 11 Regimental histories 10 Soldiers 10 Aerial operations, American 9 Vietnam War, 1961-1975 9 Prisoners and prisons, German 7 Veterans 5 Korean War, 1950-1953 4 Officers 4 Prisoners and prisons, Japanese 4 World War, 1914-1918 4 Chaplains 3 Concentration camps 3 Journalists 3 Medical care 3 Medical personnel 3 Participation, African American 3 African American fighter pilots 2 Air pilots, Military 2 Americans 2 Artillery operations, American 2 Fighter pilots 2 History, Military 2 Iwo Jima, Battle of, Japan, 1945 2 Japanese Americans 2 Military chaplains 2 Military engineers 2