World War, 1939-1945 Campaigns 105 Military campaigns 42 History 35 Regimental histories 25 Armed Forces 18 Soldiers 14 more ... Officers 8 Aerial operations, American 6 American 6 Military leadership 6 Military operations, Aerial 6 Generals 5 History, Military 5 Japanese Americans 5 Command of troops 4 Organization 4 Veterans 4 Prisoners and prisons, German 3 Prisoners of war 3 Aerial operations, British 2 African American soldiers 2 Airmen 2 Ardennes, Battle of the, 1944-1945 2 Artillery operations, American 2 Atrocities 2 British 2 Chairmen 2 Chaplains 2 Combined operations (Military science) 2 less ...