Is wearing a flag patch on a backpack against regulations?

I would say no. Plenty of troopers have it on helmets, it's on a variety of things. I have one on my assault pack. There are no regs specifically against it. Get over it, get busy killing Tangos.

yes

If the army issues it ,then yes.

Easy answer. The CSM doesn't want you putting the flag patch on a backpack. It doesn't matter what you feel is right. Don't put the damn flag patch on a backpack. You're a PFC. You need to be seen and not heard, both by a preference of everyone higher ranked than you and as a suggestion from me to you so you won't draw unwanted attention to yourself.

Be small. Be unheard. Don't rock the boat, private. This isn't a fight worth the attention.

No

Yes

Yes. It is only allowed on the sleeve.

yes

Whether it is according to regulations or not, it certainly has been a common practice since at least the VietNam war. And has helped troop moral

No, if you are activated and heading overseas.