In WW-II only one US servicewoman was captured by the germans in the western front
https://www.youtube.com/watch?v=XcmLdBgGmDs
the rules are messy *because* women are in combat roles or too close to front lines and compete for the same promotions.
if they were safely behind, the rules would not be messy. Their carreer paths would not cross combat soldiers' paths. Their actual military training would be so minimal that nobody would think about sending them near combat.
In WW-II there were separate auxiliary branches for woman, even for pilots https://en.wikipedia.org/wiki/Women_Airforce_Service_Pilots They were a continent away from combat and no combat pilot ever feared losing his promotion to them.
if women can not do admin work safely in the capital... then... they can not be public workers too.