Context : Joachim Boosfeld (1 June 1922 -- 19 June 2015) was a Hauptsturmführer (Chief Storm Leader/Captain) in the Waffen-SS during World War II. He was 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. He was also one of 631 men to be awarded the Close Combat Clasp in Gold. 
Question : What was the military branch for Joachim Boosfeld?
Waffen-SS