- Second World War (1939-1945)
- Hauptmann (Captain)
- Bataillonsführer Regiment "Von Stössel" / Kommandant Festun Driant
- Awarded on:
- November 16th, 1944
As Bataillonsführer of Regiment 'Von Stössel' and Kommandant of Festung Driant near Metz. Weiler won his Knight’s Cross for defending the fort against the might of Patton's Third Army, forcing the Allies to take Metz by the flanks and thereby allowing an organized retreat of German forces.