Campaigns 42 World War, 1939-1945 31 Military campaigns 26 History 13 Soldiers 13 World War, 1914-1918 13 Regimental histories 10 more ... Armed Forces 7 Aerial operations, American 2 American 2 Generals 2 Japanese Americans 2 Medical care 2 Military operations, Aerial 2 Non-commissioned officers 2 Oral history 2 Prisoners and prisons, German 2 Veterans 2 Aachen, Battle of, Aachen, Germany, 1944 1 Aerial operations, British 1 African American 1 African American soldiers 1 Airmen 1 Argonne, Battle of the, France, 1918 1 Artillery operations, American 1 Atrocities 1 Battle casualties 1 Biography 1 Bomber pilots 1 British 1 less ...