The Knight"s Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Nikolaus Büsen was killed on 14 June 1942 over North African coast. He was posthumously awarded the Knight"s Cross on 4 September 1942.
Bibliography.
Aviator badge Front Flying Clasp of the Luftwaffe in Gold Iron Cross (1939) 2nd Class (29 November 1939) 1st Class (13 June 1940) German Cross in Gold on 24 November 1941 as Oberleutnant in the 1.(F)/AG 122 Knight"s Cross of the Iron Cross on 4 September 1942 as Hauptmann and Staffelführer of the 1./Fernaufklärungs-Gruppe 122.
