That reminds me about the very interesting programme shown earlier this week on "Yesterday" (used to be the History Channel). It was about the Wilhelm Gustloff which was a Nazi cruise ship sunk by a Russian submarine in 1945. The 9,343 who were killed make it the biggest loss of life from one ship in recorded history. 5,000 of the dead were children. The horrible thing about it was that instead of sailing under a Red Cross it was flying the Nazi ensign and surrounded by a strong naval escort making it an entirely legitimate target.