- Second World War (1939-1945)
- Oberleutnant der Reserve (1st Lieutenant of Reserves)
- Führer, Stabskompanie, Panzer-Regiment 3, 2. Panzer-Division, Heer
- Awarded on:
- May 9th, 1945
Submitted two times (march 1945 and on 09.05.1945) ; first proposal arrived at HPA on 28.03.1945 ; no confirmation for an award to find in the files, could be the proposal wasn't handled or rejected ; second proposal is not existing anymore, probably was a "Fernschreiben" ; Prien's name was noted down in the book "Verliehene Ritterkreuze" by Major Domaschk with #5101 ; according to this entry the proposal was coming in on 09.05.1945 and handed over (to Gen Maisel ?) and KC was awarded by written message as well as via telephone to OB West ; award by that was after 08.05.1945 and therefore illegal ; also neither Maj Domaschk nor Gen Maisel have been authorized for awarding at this time.