What highest Nazi award did Karl-Heinrich Brenner earn?
Karl-Heinrich Brenner:  He was a recipient of the Knight's Cross of the Iron Cross of Nazi Germany. Knight's Cross of the Iron Cross: The Knight's Cross of the Iron Cross (German: "Ritterkreuz des Eisernen Kreuzes" ), or simply the Knight's Cross ("Ritterkreuz "), and its variants were the highest awards in the military and paramilitary forces of Nazi Germany during World War II.
The Knight's Cross of the Iron Cross