Rudolf Hess and Ritterkreuzträger of NSD-Studetenbund

Münich, 27 January 1941: Deputy Führer and Reichsminister Rudolf Hess, on the occasion of the 15th anniversary of the Nationalsozialistischer Deutscher Studentenbund (German National-Socialist Student Association), greeting officers of the German Wehrmacht, all holders of the Knight's Cross (Ritterkreuzträger) and all of whom had been members of the NSD-Studetenbund. From left to right: Oberleutnant Wilhelm Walther (Ritterkreuz on 24 June 1940 as Stoßtruppführer 4.Kompanie / Baulehr-Bataillon zur besonderen Verwendungen 800 "Brandenburg"), Leutnant der Reserve Helmut Ringler (Ritterkreuz on 15 May 1940 as MG-Halbzugführer in Sturmgruppe "Stahl" / Fallschirmjäger-Sturm-Abteilung "Koch"), Leutnant der Reserve Fritz Steger (Ritterkreuz on 15 August 1940 as Zugführer in Infanterie-Regiment 20 [motorisiert] / 10.Infanterie-Division [motorisiert]), and Leutnant der Reserve Franz Berger (Ritterkreuz on 19 July 1940 as Stoßtruppführer 11.Kompanie / Infanterie-Regiment 130 / 45.Infanterie-Division).

Source :
"German Army Uniforms and Insignia 1933-1945" by Brian L. Davis
http://alifrafikkhan.blogspot.com/2013/06/album-foto-grup-ritterkreuztrager.html
https://forum.axishistory.com/viewtopic.php?p=1651381#p1651381

Ritterkreuz Action of Helmut Ringler

Helmut Ringler (4 October 1915 - 22 June 1962) received the Ritterkreuz des Eisernen Kreuzes on 15 May 1940 as Leutnant in Sturmgruppe "Stahl" / Fallschirmjäger-Sturmabteilung "Koch". The medal was awarded for his role during the capture of the Veldwezelt bridge during the German invasion of Belgium. He and his Zug of HMGs landed as part of the second wave. Quickly taking charge, Ringler and his troops were able to seize a hostile trench section and thereafter break up opposing counterattacks against the German bridgehead with effective machine gun fire.

Source :
https://www.forum-der-wehrmacht.de/index.php?thread/51961-ritterkreuztr%C3%A4ger-helmut-ringler/
https://www.tracesofwar.com/persons/66442/Ringler-Helmut.htm