"Hans Heidtmann (8 August 1914 in L\u00FCbeck \u2013 5 April 1976 in Hamburg) was a German U-boat commander in World War II and recipient of the Knight's Cross of the Iron Cross (German: Ritterkreuz des Eisernen Kreuzes). The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.U-559 under the command of Heidtmann came under attack by several British warships and an aircraft on 30 October 1942."@en . "1976-04-05Z"^^ . . "Hans Heidtmann"@en . . "1976Z"^^ . "German World War II U-boat commander" . . . "1914Z"^^ . . "1934Z"^^ . . "Heidtmann, Hans"@en . "(to 1945)" . "1914-08-08Z"^^ . .