Can a platoon sgt tell a female soldier that she is required to wear a bra when in civilians?

SHE CAN TELL YOU "WHATEVER", BUT BEING YOUR "SUPERIOR" I WOULD ADVISE DOING IT. IT IS ALL A PART OF THE "DISCIPLINE"(OR CONTROL) YOU GAVE UP WHEN YOU JOINED UP. PEACE

Absolutely not.

It could be that this NCO is looking ahead. This female soilder with average size and shape breast (I'm only guessing here of course)may not be much of an issue appearance wise. However a lady who is much more endowed would be bound by the same consideration.

That's just stupid, they should be looking at your eyes when they speak to you, you're not naked, you have clothes on.

Just my opinion.

I always love wearing my bra.

Just read up on the current regulation. 670-1 leaves it to the discretion of the commander. If your commander is male he will most likely side with your PLT SERGEANT. Who you stated was female. It’s the safest course for him to go with. The regulation keeps mentioning conservative appearance and not wearing undergarments is not normally considered conservative so my interpretation would be that yes your PLT SERGEANT can and should require you to wear under garments. I would point out that they could order you to wear the under garments provided by the military if you push this. My advice is say okay get something that comfortable but conservative and wear that when off duty. I also think your PLT SERGEANT is going through your SERGEANT, who is male, to teach him how to handle this situation. Having been in charge of females I can say this is very uncomfortable topic to address. It requires not only requires him to be very professional but very understanding of your position. If he is a good leader then you should respect the difficulty of his position and help him out if not feel free to go talk to your PLT SERGEANT. It is possible that there is a simple misunderstanding. I wouldn’t take this higher than that. Remember the key word is conservative and you would have to be firmly on the right but I do not see how.

Why go down this rabbit hole! Regardless of what the regulations say, a male sets himself up by pursuing this. If it is a problem find a female to talk to another female

Since Ft. Bliss just had its entire chain of command fired due to a rape and murder of a female enlisted. I would say " put a fn bra on " because provocative dress " provokes" and a superior is responsible for your safety, even though you ain't got two pennies in your pocket to rub together.

I DON'T THINK IT WOULD MATTER WHEN YOUR OFF DUTY BUT I SAY IT WOULD
BE POPER WHEN YOUR IN UNIFORM

Simply put, maybe yes. Regardless, maybe the platoon Sgt should quit checking you out?! Personally, you’re off duty, so, unless your purposefully ‘tacky’ in your appearance, I don’t see a problem.