Context : Heinz Franke (30 November 1915 in Berlin-Steglitz -- 5 April 2003 in Sasbach) 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). 
Subject : Heinz Franke 
Relation : conflict
Which war was Heinz Franke a part of?