Pictorial works History 57 World War, 1939-1945 20 Description and travel 13 Fighter planes 8 Campaigns 6 Social life and customs 6 Airplanes, Military 5 Chronology 5 Natural history 5 War 5 Military history, Modern 4 Tank warfare 4 Tanks (Military science) 4 United States 4 Armed Forces 3 Armored vehicles, Military 3 Guidebooks 3 Malaysia 3 Miscellanea 3 Sources 3 20th century 2 Aeronautics 2 Ardennes, Battle of the, 1944-1945 2 Battles 2 Beaches 2 Civil War, 1861-1865 2 Design and construction 2 Equipment 2 Equipment and supplies 2