Context : Rudolf Roy Jr. (15 August 1920 -- 17 December 1944) was a Untersturmführer (Second Lieutenant) in the Waffen SS during World War II, awarded the Knight's Cross of the Iron Cross, which was awarded to recognize extreme battlefield bravery or successful military leadership by Nazi Germany during World War II. 
Answer : Knight's Cross of the Iron Cross
What was the award received by Rudolf Roy?