Other
Uss Alabama Battleship Memorial Park: Uss Drum (Ss 228)
Read the historic stories about the Gato-class submarine of the United States Navy, the first Navy ship named after the drum. The history of the USS Drum can be downloaded as a PDF file.
BBC
Bbc: History: Bismarck Sunk
Concise account of the destruction of the German navy's flagship, the Bismarck, during World War II.