Bundeswehr :
Major General considers army service to be not potential in the long term with out obligatory components

dpa
First, a voluntary army service is sufficient. In the long run, nevertheless, the “limits of voluntariness” are pushed, says the commander of the house safety division Andreas Henne.
https://www.faz.net/aktuell/politik/generalmajor-wehrdienst-ohne-pflichtelemente-auf-dauer-nicht-moeglich-110514098.html