History World War, 1939-1945 Aerial operations, British Military operations, Aerial Pictorial works British Campaigns Aerial operations Armed merchant ships Merchant marine Military campaigns Naval convoys Photograph collections Aerial reconnaissance, British Biography Military operations, Naval Naval operations Photographic reconnaissance systems Weltkrieg (1939-1945) Aerial operations, German Aeronautics Aeronautics, Military Air pilots Aircraft accidents Bombing, Aerial Bristol Beaufighter (Fighter plane) Britain, Battle of, Great Britain, 1940 Commando operations Cryptography Dechiffrierung