Is wearing a flag patch on a backpack against regulations?

During my years we didn't wear them on our uniforms as part of our accoutrements. Down South we wore them sparingly as they made good targets. so, I don't really know regulation wise.

no

Well, I read backwards instead of backpack, and that’s why I was 4F.
Dyslexia.

sp/4 Honorable discharge 1974

No. When the flag is advancing on the enemy position it appears backwards on the pole. This is why it is shown backwards on the patch. We are ever advancing, and pressing on...

NO

Not sure!

Yes

Backpack is not part of the uniform. It should never be on a backpack.

No