World War, 1939-1945 Campaigns 25 History 15 Naval operations 13 Submarine 8 Aerial operations 4 Germany 4 Naval operations, German 4 20th century 3 Aerial operations, American 3 Biography 3 Naval operation 3 Personal narratives, American 3 Personal narratives, British 3 Pictorial works 3 World War, 1914-1918 3 Aerial operations, British 2 Atlantic Ocean 2 Escapes 2 Great Britain 2 History, Military 2 Naval convoys 2 Naval operations, British 2 Normandy 2 Personal narratives 2 Shipwrecks 2 Soviet Union 2 World War,1939-1945 2 World war, 1939-1945 2 Z1 2